Invoiced for two phones

December I brought an IPhone 7 from Telkom Vaal Mall, when my first debit order came through I noticed the amount was high. When I want to enquiry at the store I was told I've been invoiced for two phones but I only received one phone, when they checked who's using the other number it showed someone else. They apologized about the error and promised to fix it and reverse the money but even today nothing has happened. I've been invoiced for two phones for fours months now, I've been calling the call center for assistance but every time I've been given a different case number (3 case numbers in total) none have been attended too. No feedback has been given from the Telkom stuff, and I'm the who's always calling them. Poor customer care, would never recommend anyone to Telkom.