BAD CREDIT RECORD

This started when I was getting calls from telkom that I have to make payments on my overdue account. That was very strange for me because I have never had an account with Telkom. I have been talking to different people from their help desk, urging them to investigate the matter further as I have never had any dealings with Telkom.I have been told to get an affidavit from the police station and fax it through explaining that I have never had an account with them. I have done that more than once, the other one told me to fax a copy of my ID and another affidavit and I have done that. Telkom has not contact me even once after I have made several attempts to work with them and resolve this. Now I cannot get credit because this appears in my credit scoring and it is affecting my credit record as well. I am not happy about Telkom and I have been more than patient with them but they are not helping me or taking this matter seriously, yet I am getting bad credit record for something I do not know. I do not even know the address which they claim was mine and I have asked them to investigate but nothing. I am fed up and I want this to be resolved or I am going further.