Business Client but no support

We as a company decided to port all our company cell contracts to Vodacom because of the bad service we have received from MTN. About 50 lines are being moved as the contracts expire.<br> <br> We have ported lines to Vodacom in Feb but MTN is still sending us the bill for the lines, although they have been ported. Really?? Tried to send emails, not reply, called, not answer, but every month we need to pay the account. <br> <br> Split billing requests have been asked to be loaded, a year later and it still have not been done!!!<br> <br> BAD BAD SERVICE!!!!