Worst customer service!!

A simple task like moving a debit order date should be easy to do.. Not for vodacom. I phoned them to move my debit order date from the 1st to the 7th where I was told that I was going to be debited twice in the following month. However, 3 days after my 20 minute call with vodacom my account was debited for the 2nd time that month, my debit order bounced anf returned unpaid. I've since phoned them again, and where told that they will not be able to remove that bounced payment from my name even though it was squarely their fault. I don't know what to do, I'm past the point of frustration with the childish level of service from vodacom. Stop supporting vodacom!