Pathetic service from Telkom

Pathetic service from Telkom. After doing an upgrade with Telkom at the end of August, I am now being billed for the old and few fibre. I apparently have to submit a cancelation for the old fibre, even though their agent called me and did the upgrade. The worst part is, nobody can cancel the old fibre as Telkom opened my account as a business account. The people dealing with personal accounts cannot find my account and therefore cannot cancel. The people dealing dealing with business accounts want my cancelation on my company letterhead even though I told them numerous times that I don't own a business and Telkom created the mistake by opening a business account for me instead of a personal account. Mind you, the account I receive from Telkom is in my name and not that of a business.