MTN month to month very bad service from mtn

I have a month to month with mtn, i made a manual payment on the 2nd of February but made a mistake on the reference. I have been in touch with mtn on twitter and i was asked to send pop which i did on the 2nd of Feb, then again on the 4th of February, then again on the 5th of February, then again on the 9th of February. Each time i sent on twitter the acknowledge that the POP has been received, then via emails i am asked to send again which is frustrating as i have sent the POP more than 5 times. I still do not have wifi due to this and today is the 10th. First reference was B***4 and second one was REQ***.