Bad service

Good day

May i please ask one of your consults to call me back. Apparently i'm being barred to call your call centre. Who should i call when i'm running out of data.. Must i call MTN when i have a contract with you?

I'm using my phone for business and i can already see what i have now won't last me till month end. I don't understand what the problem is cause ive never missed a payment on my account. I ask for top ups cause i know i can afford to pay. I'm on the right package, i was using it as a hot spot cause my children came for holidays. I will only run out during school holidays, i dont need a bigger package. I normally don't finish my data and normally carry over to the next moth if you can check on your system.