Pathetic Service actually no Service

All 4 of my MTN lines we suspended, because my credit limit apparently was reached. I think is a pathetic rule as I pay my full account via debit order every month never faulting no matter what the bill is. 2 lines are used for business purposes so they do come to a lot. I don't see why you suspend me account because of a credit limit you set. I tried calling 808 no one flippin answers so I go in to the branch & after a 1 hour wait I am greeted by rude and an unfriendly woman called Smatina who does not even say hello pathetic service, I will actually never renew my contracts with MTN purely of this **** service received. Anyways she put the lines on and told me I need to call 808 to increase my limit I told her for 3 hours I been trying to call the call center and no one answers. So please tell me who can assist me to increase my credit limit because it seems to whole of MTN is on strike. You should allow people to cancel their contracts and go to a reliable service provider and you don't offer the service I pay for. my number is .