*********** and useless billing and call centre

I had a Telkom mobile data contract which ended around march. I gave notice that I do not want to renew my contract in advance as per my contract in the 22nd or 23rd month and I do not want that contact renewed. To my amazement i was sent a bill end of march where I am being penalised for the cancellation. I called the call centre on the 7 March 2016 and spoke to Mandy who said that it will be sorted out and that it will reversed but this did not happen and I was debited for the amount. I then put a stop order on the debit and had the funds reversed. I called again on the 7 April 2016 to have this issue sorted out and spoke to Sifiso. I then received an sms saying that the account will be suspended for my new contract and that I could be blacklisted for for this. I called again on the 15 April 2016 spoke to Nompumelelo who promised that a manager will call me and till today nothing. I called again 18 April 2016 and spoke to Zandile who escalated the problem and I still don't have this issue sorted out. I WILL GO THE LEGAL ROUTE AND ALSO MEDIA TO EXP[OSE TELKOM AND WHAT YOU GUYS ARE DOING!!!! I WILL NOT LEAVE THIS ... I WANT THIS ISSUE SORTED OUT IMMEDIATELY