Bad Customer Service

On the 2nd of December I went to Telkom midway crossing to update my bank details they were updated but I was told I need to make a deposit for the month of December as change will only apply in January, i did a cash deposit on the 19th of December but telkom went and debited my account again yesterday, I called this morning spoke to Nosipho Ndlovu she told me she cant refund me for now I need to wait 14 days for a refund and the problem is that my money for excess I need to pay as my car was in an accident. I'm really disappointed withi how telkom is treating me been writing reviews and sending emails to the management but no one is calling me since the 2nd of December