No feedback about my cancelliation

I relocated from JHB to Duran last year July, I asked zone fitness to cancel my contract and they advise that they can't cancel it as I was still owing them and they advise that the last instalment will go off at the end of November. To my suprise zonefitnes deducted until the 27th of January through Norman Bisset Attorneys... now I'm getting calls everyday from NBA telling me that my last installment will go off at the end of Feb and the amount that will be debited in my account is R112 yet my installment has always been R185. I sent an email to Hilda zonefitnes asking her to cancel my contract, she ask for my gym membership number and I told her that I lost my card the time I was busy with relocation and I gave her my ID number... I did not receive any feedback from her.. sent another email in December to her still no response... I sent the last email to hilda again on the 4th of this month still im not getting any joy from her. I called zone fitness life centre today and I ask to speak to hilda, the guy I spoke with advise that Hilda was available but she was busy on another call. Up until now I haven't receive any feedback. Can someone assist me with regards to my issue.