No responce since 29 December!!!

Upgraded in November after a huge struggle to get my contract upgraded since August!!! My December bill was double deducted. I phoned Telkom on the 29th of December and logged a complaint. I phoned them this week twice with no feedback! I checked my account for January and again they charged way more than my total contract. I will not pay this account and I will block the debtor if they deduct any more money that they should not deduct. How do we manage to pay our bills if some of them gets double deducted. I need this sorted immediately. I will say this again: I WILL NOT PAY THIS BILL, and I do have a recording of the day I upgraded and I asked them to take off the extra 5 gigs as I do not want that.