4 Months waiting on Telkom to pay my credit

On December the 3rd I requested termination of my ADSL contract with Telkom only (which was scheduled for 3rd of January). Termination proceeded as scheduled but when I app**** for LTE service I was shocked to be told that I was listed on the Credit Bureau as I had outstanding payment. I asked how much I owed and was told R569 (which was my monthly premium). I paid that only to be told towards end of January that Telkom actually owed me close to R1,200 (by themselves). I then asked for my payment and was told they needed to log a case on their system and someone from accounts would call me within the next hour to get my banking details for payment. Today it's 3 months later and I am still awaiting that call. I have been to the Canal Walk Telkom shop almost at least once (sometimes up to three times a week) and leaving Callback requests which have not materialized. I have tried logging cases onto their Online system, no result as they revoked my accounts on termination. I have tried their Online chat and everytime they either tell me someone is going to get back to me within the next hour or I get terminated and the server blocks me then I connect to teh next Agent and then the cycle recurs. I have tried to be friendly but Telkom has decline all my call-outs trying to reach out to them and I am left with no option but to seek intervention beyond myself