Contract Activated without Consent

On the 28/04/2015 I went to VA Soweto to take out a membership for my son as they had a special that kids get a free gym bag when joining in April, I was assisted by Tony at first and then he told Lucas to continue with the application, I asked him how much I am expected to pay monthly for my son's membership and he advised that he was not sure he will ask Tony and I also asked him for a copy of the contract since he asked me to sign on a signing pad more than once without explaining anything on the contract and he advised that the printer is currently now working, I then asked him if I will get a back as this is the main reason why im taking a clubv membership now, he told me that Tony will confirm, before I left the club I asked again how much I will pay and he told me that they will let me know, the contract is not submitted yet, they will do it as soon as I send my son's birth certificate, and they will forward everything to me, he gave me his email to forward the details, the next morning i then sent the below email, till today i didn't receive feedback but my bank account was billed with an amount of R75 on the 4/5/2015? I want this contract cancelled please..<br> ***.z