Horrible service yet again
The communication between MTN and Mondo is not in sync.
I received a 10MB uncapped 400 fair usage line which I have been using, but I am being billed for a 20MB Uncapped 600 fair usage line. 
1. I called MTN the directed me to Mondo point of sale.
2. Called Mondo directed me back to MTN
3. Called MTN directed me to a different department.
4. Transferred to that department transferred to another.
5. Told to cal 135
6. Called the technical they wanted a reference number.