Telkom Package Hostage plan

My telkom 24 month contract expired two months ago , and after cancellation by telephone , faxing signed documents with copy of ID and other relevant requested documents. They are still billing me for the cancelled contracts. Ive been to the in store branches at Collonade and Montana retail park to physically cancell the contract and take new products. I am now being billed for all the old and new contracts. I know this is in breach of the Financial Act . Ive also tried to once again cancell it tonight, via telkom onlinechat. The agents said its the business divisions problem and cut-off the conversation. I am now at witts end with exhausting all possible attempts to rectivy the broblem. It seems they keep the account going and I must keep paying to avoid a bad credit reference. I feer i cannot afford it any longer. Acc ref are. ********** , ********** , ********** 343 and my land line ********** .