When is enough enough???

since November 2015 I have had the problem of *********** staff making an error, multichoice try month after month to debit the incorrect account for payment, even after about 15 calls to them demanding that the debit order be cancelled as the account number is incorrect and every month I pay cash and my decoder gets switched off, I then need to pay reconnection fees month after month being November R50, December R50, January R50, February R50, and now in March will be another R50. My cell bill just on calls to multichoice is R874.00 to date. I have requested 5 times for a manger to contact me regarding this error but no one ever phones back. Team leaders tell you \ I will take ownership of your query, and I PROMISE TO PHONE YOU BACK ONCE I HAVE RESEARCHED THIS QUERY\".which never happens. In the meantime I the customer am the one who is irritated, even as I type this aim on the phone to multichoice with another team leader named Abdul,the call is at 39 minutes duration , and seems it cannot be resolved."