Telkom's services totally ***********!!!

Telkom accounting is a disaster, The copper cables in our area had been ****** several years ago, and a service call was logged. Telkom then advised they would not be replacing the copper cabling, and I instructed them to cancel my services. Four year later I am receiving calls from the collection attorneys and I logged a dispute with Telkom's billing department for a service they couldn't even provide. After tree months of various call etc. I am still being harassed with calls and sms's from both Telkom and the collection agents, although I have received a notice of resolution via sms but no official communications from their billing department to provide the collections agent. Telkom's services is a disgrace and they should be embarrassed with their own incompetence. I have phoned Telkom's billing department to request the clearing documentation with no Luck. It must be costing Telkom al lot of money and I am absolutely tired of being harassed for an internal Telkom error and incapability to resolve this!!! How do I get Telkom them to resolve this?