Unknown accounts from Telkom

Telkom Billing Department have been sending me an account for a person and service unknown to me since June 2018. I have repeatedly written (including two registered letters) to Telkom asking them to update their records. I have visited the Telkom Shop twice in Okavango and explained the case to three different employees where I obtained a reference number and told that the Billing Department would call me. To date nothing has been done. I have now obtained a Police Affidavit regarding this matter as I would appreciate this problem being checked for ********** activity.