********ly debited

My son went to find out about a membership due to him being only 18 years only they guy made him sign the contract and inserted the banking details. He has message where he advised the guy he will not be joining same as we cannot afford same. They did not even give him the blue form as they **** and said he was given it. They then debited him twice and there was no money in the account. I called the Head office to cancel same and they refuse to cancel as they require a four month payment. I don't have the money and my son didn't if you the gym once . I need same to be investigated as i am totally unhappy with what they have done