Trying to cancel but they still deducting....very poor service!!!!

I wanted to cancel my son's contract, they said I must pay 2 months in advance. As I did..now they are deducting money again after 2 months snd said I never phoned to cancel...pathetic service!! I am so upset,I went into the branch, even phoned from their phone to customer service, now they say I never phoned,the call is non existence...but all the care supposedly recorded!!! .and I must pay another 2 monts. So what is the use of going into the branch, phone there to cancel, fill in a form.which they now say doesn't exist...and my sons tag was canceled . As soon as I paid the 2 months in advance to cancel. They just shrugged their shoulders at the branch,customer care is not helpfull at all, and I must pay another 2 months, for absolutely nothing!!!! So I am paying for 4 months, no service,no gym....pathetic!!! I will never recommend anything fitness....why phone to cancel, why lie and say pay 2 months in advance ance then your contract is canceled...and then after 2 months they just take your money and threatened you with attorneys if you don't pay....so please tell me what am I to do now? Useless to phone Custer care...they don't do there work!!!!!!!!