MTN number doesn't work after moving to prepaid

My contract ended on the 2nd of October. Then on the 3rd I cancelled it and switched it over to prepaid. Since then I'm unable to make calls or use my data. I've also loaded some prepaid data and it still doesn't work.

I called 135 from my MTN number 5 times now, and tried a few different steps that the consultants told me to do and nothing is working. They have reset my number or something and I switched off my phone for 10 minutes. Nothing...

I checked the internet settings etc on phone settings, looks fine.

I wouldn't call MTN consultants "service champions" if I were you.