Billionaire politician Clive Palmer is taking more legal action against timeshare investors at his Palmer Coolum Resort, after a series of votes over control of the resort went against him.

Angry villa owners locked out of their holiday homes at the resort by Mr Palmer have hit out at the increasingly powerful politician, calling him a "spoiled brat" and a "tyrant".

About 300 owners who invested in time shares at the resort have been unable to access their villas, rendering an investment valued at as much as $110,000 worthless.

Mr Palmer declined to be interviewed by 7.30 but in an ABC radio interview on April 7 he accused the villa owners of not paying their rates.

"The issue about their villas is that they haven't paid their electricity bills or water bills that your listeners have to pay everyday and they think because they come from a socio-economically advantaged group, they don't have to pay for electricity and water. They want me to pay it," he said.

Western Sydney small business owner Ivan Mikulic and his wife Catherine are among the investors frustrated with the situation.

Mr Mikulic says they continue to pay their rates and it infuriates him when Mr Palmer says otherwise.

"We've paid every bill and every levy that's come our way," he said.

"We've got a folder that thick of all of our invoices and transfer receipts so it's a straight out lie to say that.

"Because we're just ordinary people paying our way and he's walking all over us like we're nothing."

Madeleine Gilmour, 71, is leading a growing number of owners prepared to publicly challenge Mr Palmer - one of Australia's most powerful and litigious men - and she is not concerned about being sued.

"I'm a grandmother. I'm quite capable of representing myself if I need to," she said.

Palmer to appeal against body corporate vote

Mr Palmer recently called a meeting of owners to vote on members of the body corporate controlling the villas.

Ms Gilmour arrived with a locksmith and threatened to call the police if she was not allowed into her villa.

She eventually was let in, and she and her fellow owners had a major victory.

They won the vote for all seven positions, potentially allowing their return to Coolum.

Jeff the dinosaur is a landmark feature of the Palmer Coolum Resort. ( AAP Image / Dave Hunt )

In the same April 7 radio interview Mr Palmer hailed the vote.

"Well there's no tension," he said.

"What happened is we went to the adjudicator of body corporate in Queensland and suggested that we should have a democratic vote and let these people vote.

"And they voted and it was a triumph of democracy and we're quite happy to accept that verdict on the basis of a fair vote, so there's nothing about that."

But it seems Mr Palmer does not value democracy as highly as he does the judiciary.

7.30 can reveal that late last week he launched an appeal against that vote.

Mr Mikulic says his frustration grows as Mr Palmer's political clout and advertising spend increase.

"It's easy to splash money around but what's there to believe in? People that know him or know what he's capable of, I mean, he just comes across as a spoiled brat with too much money," he told 7.30.

"[Palmer] drives around in his fancy cars and stuff. That's all great - we can all go and spend money."

For some owners it has been almost two years since they saw their villas, but they say they will continue to fight their increasingly powerful landlord.

"He's a tyrant, is the way I'd classify him," Mr Mikulic said.

"He hasn't allowed us access to our property, he won't let us stay there. We can't sell it. I mean, whose going to buy it if you can't even go there."

Ms Gilmour says in the past year alone, about $500,000 has been spent by owners "on defending or bringing legal action against Mr Palmer".

Palmer campaign insider speaks out

The dispute comes as former Palmer United Party campaign manager Glenn Mudie gave his first television interview speaking out against the man he wanted to see become prime minister.

Mr Mudie ran the campaign for one-time Palmer lieutenant Bill Schoch - Mr Palmer and Mr Schoch are now involved in a separate legal action.

Mr Mudie predicts Mr Palmer will make life difficult for the Federal Government when he assumes the balance of power.

"Every bill that's put up to the Senate, if you're holding the power to put that bill through, well as far as Clive's concerned he may as well be prime minister by holding that balance of power," he said.

Mr Mudie predicts Mr Palmer will do a deal with Katter's Australia Party founder Bob Katter, and he is worried that could deliver him the balance of power in Queensland too.

"If they vote for the Palmer United Party in the forthcoming Queensland election and they take over, they'll have a bunch of cowboys running the show," he said.

"If they thought Queensland was in a bad state then they haven't seen anything yet."

In a text message to 7.30, Mr Palmer suggested Mr Mudie may be a Liberal Party plant trying to discredit his party.

"Sound like a supporter of Campbell Newman, he never had any position in our party ... sounds like a plant to me just trying to mislead you," he wrote.