Belfast-born Keery, who set up the café with his identical twin brother Alan, cut short the interview because "I don't like the questions that you're asking me".
In his Facebook post, Keery said he felt the interview was "completely unfair", and questioned how poverty and property prices in London could be blamed on a small business owner.
I still have to pay over the top rent for my premises and pay the 12 staff I have employed so I either have to make profit or I will be out of business. Maybe if I charged over £3 for a coffee and dodged all the taxes in this country like some cafés - the reporters would leave me alone would they?
If you want someone to solve the poverty crises in London I don't think I'm the man to do that as I am too busy trying to cure Ebola and get Kim Kardashian to keep her clothes on. Also you didn't even pay me for the cereal which you could so easily afford with your overpriced river island suit so I will send you a bill for the extortionate £3.20.
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