MTN sales Team need to do better

MTN is just taking money for a contract that they should know I am not using because initially I was told that my sim only data wasn't activated and I made call to have it activated. when this was done I also found out that the Sim Data only that I got don't work on any other router other than MTN approved router. So After I have been paying for over 3 months MTN they have been investigating what happened during the time I got this contract. But my issue is that they haven't came back to me with regards to this investigation that was supposed to take less than 7 working days.MTN Online and call centre consultants need training as they act like they don't know anything. I mean how do you sell stuff to clients knowing they won't do what they are supposed to do. In all of this I have to find an alternative Provider so that i can continue with my work