Very poor service

I am writing this review on behalf of my grandmother. She had a line with Telkom, the line was cancelled and the account was paid up to date and closed as she has moved to another property. There was apparently an outstanding amount which we were not aware off and they account was handed over to Nu Debt for collection. I am sitting with no less than 20 emails covering a time span of 2 months where I have requested statements as we are not unwilling to pay, up till now, we have not received a statement. I have phoned them on numarous occasions asking for a statement and all I got was no statement and the phone put down in my ear. Their customer service is atrocious and I hope they get taken to task for this. Now my grandmother has been blacklisted because of their poor service.