Gym Company in zone6 Diepkloof

I went into the Gym to cancel my contract with them as Money was being debited from my account and I have never used their services before. They made me agree that I signed yet the contract was clearly invalid as there was no witness or manager signature on the useless piece of paper I was given. I tried to cancel the contract at their premises and a rude and ********* manager called George told me I was a **** and I will have to pay or they will list my name on itc. I believe this is unprofessional behavior and more over day light ******* and abuse of Human rights. I want them to stop my debut order and cancel that contract. I have never come across such rude people who swear at their clients.