Wrongly debited no refund

Telkom is one of those businesses where if you don't have an issue it's a good day. Anyway been with them since 2008, the debit my account normally twice on the last day, then the 5th of the month but this month they debited on the 15th again and an amount heavily exceeding my combined totals, one promise after another is not kept such as 3 days to be refunded but never happened nor is 16 days later yesterday the told me I wouldn't be debited today, but I was, the told me now my account will be credited with my 5ths debit being deducted and refunded on Tuesday latest we will see what happens but not expecting any difference, slowly I see my services are moving from telkom anyway when the used to have all my telecoms services