Bad service and bad billing

Last week Friday I wrote a review about multichoice. They disconnected my services saying I owe them R705. After we discussed that with them and they reconnected my services. On Sunday they debited R669 on my account instead of R499. I called them again and they say the money will be reversed back to me within 24hrs. But nothing so far and my question to multichoice who's going to pay the bank charges? And why debit money that we didn't agreed to? Really this guys are taking us for a ride and I think legal services should be consulted here