Billing after contract expired

In 2011, I took a 36 months contract with Planet fitness Lynwood. I paid an amount of R14 258 cash, so I did not have to pay monthly membership fee. I specifically indicated that I was not interested in renewing the contract. Humphrey and Francis (Who were the consultants) tried to convince me to take automatic renewal and promised that they would not renew without my consent. i still refused automatic renewal, so I ticked \no"and put my initial next to it. Francis ticked \""yes\"" but I scratched it out.<br> The contract expired in 2014 and we did not use the gym thereafter because we knew we did not have a contract. However"