MTN ********** dealings

We’ve got a business account with MTN with 2 numbers. MTN has added 2 extra numbers to our contract which we haven’t signed or requested for and we haven’t got the sim cards or the phones and they’ve been deducting this from our account on the monthly debit order. We’ve tried phoning MTN Business but the call centre is closed. I’ve sent numerous emails to the MTN business for more than a month with no response. The one email address on their website doesn’t even exist. Horrible service and ********** deductions from our account. No response. No answers.