Bad service

Switched from contract to Pay as you go on Friday. The switch was supposed to be immediately. I loaded data and have not been able to use the internet on my phone yet. I queried with MTN which escalated it to the relevant department. They promised that it will be resolved between 24 and 72 hrs. It has been more than 72 hrs and 6 phone calls later and still not resolved. everyone says they are escalating the problem to the relevant department but seem like no one actually wants to resolve the issue.