Telkom is the Worst Ever

The month of August 2015, my contract for 24 months were about to come to an end, so i cantact Telkom who advised me that i would need to cancel my contract a month in advance, on the 30th September 2015 i sent an email with the cancellatioon form to cancellations dept, i then received an email advising me they have received my request to cancel my contract and someone will be contacting me shortly later the day i received a call on the 15th Septemeber, were i was first offered another deal and followed by a process to cancel my contract, a few days after i received another call and advised that my contract was canceled, and end of October would be my final installment as the 24 months have come to end and my number would be changed to prepaid,on the 30th October someone from telkom called to offer me another deal and i rejected and was assured contracts are cancelled, only to find out that now my contract are active and they want to bill me for something i have closed already and that i have paid up, two cases have been loged and i have made numerous calls and the Manager has still not called me, all im told its escalated to the Manger but still hasnt called!!PATHETIC SERVICE!!!!