Her line of reasoning was that 'it's just milk so I don't see the problem'

A mother has written a complaint to Woolworths after they refused to exchange lite milk she had purchased at a Coles supermarket.

'I got the wrong milk so went to into woolies to swap it. The lady at the desk tell me I'm not allowed because it was the coles brand of the lite and I had to talk to coles about it (sic),' she wrote.

'It's just milk so I don't see the problem! My kids don't like lite milk so now they have to go without until maybe Saturday when I can borrow some money to get some more from coles.'

'u did ur dash woolies and have lost me business.'

A mother has made a complaint to Woolworths after they refused to exchange milk she had bought from Coles

'It's just milk so I don't see the problem': The mother-of-six believed she was entitled to exchange the milk

She then spoke to the supermarket chain's customer service - who told her they had no 'oblergashuns' to compensate her for the Coles milk

The mother-of-six in her mid 30s posted a number of further updates on her personal Facebook page as she took the matter further and rang up the supermarket chain's customer service line.

'I try to ring wollies and complain but they tell me they have no oblergashuns to compersate me for my milk all coz it from coles (sic),' she wrote.

The post attracted more than 10,000 comments in one day, with many people offering their own humorous versions of the dilemma.

'I had the same problem I was at McDonald's and bought a double quarter pounder started driving home forgot that I don't like beef so swung into KFC asked them to swap it for a zinger burger they said no now I'm never going to KFC again,' Brian said.

'Funny enough this happened to me... I recently bought a Toyota and when I bought it home my daughter didn't like it, so I went to a Mercedes dealer (which was closer to me) and they wouldn't exchange it!!! How rude I'm never shopping there again,' wrote Litsa Stamos.

'I once brought a train ticket from Vline to Albury when I actually wanted a plane ticket from Qantas to Sydney so I went to Greyhound buses and demanded they change it over to a ticket to Darwin. Anyway they were rude to me so now I'm no longer using Taxis,' quipped Trevor Corn.

Her Facebook complaint was met with varying degrees of sarcasm online

Many users took the opportunity to poke fun at the mother for her complaint

Others feeling sorry for the woman attempted to explain why she was unable to trade in the milk

The Facebook post had 10,000 comments at the time of publication

Others feeling sorry for the woman attempted to explain why she was unable to trade in a product that had been sold at a rival supermarket that did not stock Coles-branded products.

'Coles and Woolworths are 2 different companies. Have some common sense and stop wasting people's time,' wrote one man.

A spokeswoman for Woolworths was unable to provide a statement addressing the specific complaint, but directed Daily Mail Australia to their returns policy.

'If the product you buy from Woolworths Supermarkets is faulty or if you are not satisfied with it, then we will cheerfully refund the purchase price, exchange or repair the product,' the policy reads.

A Facebook page titled '(woman's name) for Australian Prime Minister' was created on Friday.