MTN - NO INTEREST IN HELPING THE CUSTOMER

I pay my MTN account via EFT for personal reasons and I overpaid my account by more than R10,000 in error. We suffered a recent bereavement and my mind was not on what I was doing. Whilst it was my mistake, MTN accoints have been very difficult to get in touch with and VERY unhelpful. The query keeps getting escalated with a new query number but is not being resolved. Each time a new query is opened I the customer get further frustrated because with each query there is a new turn around time. Who can I contact who will actually HELP me get my money refunded!!!!It's month end and debit orders are going to go off my account.