Account debited and I’m not a customer

Money went out of my account in December 2016 with TELKOM as the reference. I reversed it as I am not a Telkom customer. It happened again and again and for 10 month’s I cannot get a helpful response out of Telkom. The reference on my bank account means nothing to them. Almost R3500 was debited again in the last two weeks. Perhaps a hacker and not Telkom? Telkom can’t tell me that. They use KPMG for ***** cases - no progress from KPMG since January 2017. KPMG simply email Telkom for investigation - how ridiculous is that? Telkom is a broken institution and totally incapable of even simple actions. I don’t expect any response to this post. Avoid them at all costs.