Telkom ********** contract

A ********** contract was opened using my details last year at Telkom. When they debited my account, I called and told them that it was a case of identity theft and they said I should send an affidavit with copy of ID. I did that in October 2018, and got a message that case is logged with case number. I called within 30 days and I was told that it will take 30 days for investigation and verdict. Up to today in 2019, nothing has been done and Telkom is busy debiting my account and also sent a debt management company to call me. Telkom is a useless company and doesn't care about other people. They don't resolve complaints that people have.