Charging me without my permission on suspended services

My data services were suspended on 20 June 2017. I requested MTN to close my contract on 4 August 2017. They would not close my contract and they are still debited my account for R1200. I escalated this matter and she threatened to not close my account. I requested her to contact me to escalate to legal. Legal department dod not get back to me after 12 working days. I will never ever take a contract with MTN. MTN is taking money but not giving me a service.. This is a breach of my consumer rights. No company charges on suspended services!! How dumb is MTN ???