Still no resolution from MTN

Can I just take thus moment to complain about MTN and their lack of efficiency in resolving customer queries!!! I wrote in a week ago complaining about a ********** upgrade that was made on my account and they said they would look into the matter and contact me during the day. It's been a week, I haven't heard from them and they went and debited another RIDICULOUS amount from my account. I am not impressed and seriously considering cutting all ties with the company once they've cleared this mess!!!