Macy's spat with Donald Trump seems to be costing the company dear - sources close to the department store say it is being inundated with complaints by customers.

Apparently the company has already received letters, phone calls and online messages from around 30,000 Trump supporters, many of whom have claimed to have cut up their store card.

The irate customers are accusing the company of being against free speech after it cut ties with the Republican presidential candidate two weeks ago over his inflammatory comments about Mexican immigrants.

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Trump posted this message on Twitter yesterday, thanking his supporters for boycotting Macy's

Trump has been garnering support by claiming he will crackdown on illegal immigration if elected

But while Trump is doing well in the polls, a number of corporations have ended their relationships with the billionaire over his inflammatory remarks about Mexican immigrants

His supporters believe Macy's - which sold Trump's menswear collection for 11 years - is unjustly punishing him for his views on immigration, sources told TMZ.

The complaints include countless messages on Facebook and Twitter. Sue Reymann Garrett wrote: ‘I will be boycotting Macy’s. If they don’t want Trump I don’t want Macy’s. I will cut up me [sic] Macy’s card!’

Jake Graham posted: ‘I will no longer shop at your store. Chicago. Trump will be our next President. Shame on you Macy’s!!!!!’

Nino Castilano said: ‘I will be cutting up my macy’s card and you guys will no longer get me or my friends’ business any more for what you guys did to Donald J. Trump…I’ve been a proud customer for 20 years…well not any more…’

Ken Sheets added: ‘Apparently as far as I can tell, Macy’s supports illegal immigration, a fact pointed out by dismissing D Trump due to his stance on illegal immigration, and in turn I am dismissing Macy’s by not patronizing this establishment any further.’

Macy's store in Manhattan. The company had been selling Trump's menswear collection since 2004

Trump, who called for the boycott of Macy's, has been thanking his supporters over Twitter for doing just that.

'I am so happy that people are boycotting Macy's,' he said in a tweet yesterday.

In an earlier message he wrote: 'Thx [sic] to all the people who called to say they are cutting their Macy's credit card as a protest against illegal immigrants pouring into US.'

A Macy's spokesman told TMZ: 'Our Facebook page is often times used by our customers to express their feelings or points of view. Many times it does not correlate to any action.'

Trump began his tirade against Mexican immigrants when he announced on June 16 that he would be entering to race to become the Republican presidential candidate.

Trump tweeted this message a few days ago after calling for his supporters to shun Macy's

He said then: ‘When Mexico sends its people, they’re not sending their best. They’re sending people that have lots of problems. They’re bringing drugs. They’re bringing crime. They’re rapists.

‘I will built a great wall – and nobody builds walls better than me, believe me – and I’ll build them very inexpensively. I will build a great, great wall on our southern border, and I will make Mexico pay for that wall. Mark my words.’

Macy’s isn’t the only corporation to have severed ties with Trump. Mattress giant Serta, for instance, has said it will stop selling Trump-branded products, while Univision and Comcast’s NBCUniversal have cancelled plans to broadcast Trump’s Miss Universe beauty pageant.

Trump is suing Univision for $500million and has threatened legal action against NBC, among others.

Counter-attack: Protesters from the Coalition for Humane Immigrant Rights of Los Angeles cheer as a man does a mock sweep-up with a life-like pinata of Donald Trump inside a trash can on July 10