Bad service

I have cancelled the line and adsl last year . To date I am still receiving emails to pay this bill. Please can someone who has knowledge of what needs to be done handle this query-I have called the sales department, billing department and retention department from last year and to date this is not sorted. This is pathetic service. Please can someone attend to this and I will not be paying any amount on this bill as this account was cancelled and paid and Telkom still owes me the deposit which to date I have not received. Each person I spoke to advised me that it is sorted out and clearly its not. Can someone please provide me with details of who can I speak to have this query sorted out. The email address for your complaints department does not work. Please take note ********** is not valid. Await your response as my number has been already assigned to another individual and it looks like the adsl was not cancelled. All emails and proof are availale that was sent to Telkom. Await a response.