Bad service due to no feedback

Good day. I have logged 2 queries with the Customer Care Dept and send 3 emails to follow up (since I do not get through on the phone when dialling 808) and I still have not received feedback. My data and airtime disappeared on 2 separate occasions and I requested them to investigate. Up until today, more than a month later, I have not received feedback. My query references are *** & *** (email reference ***8). On a separate occasion (before my airtime magically vanished) I requested data to be bought from my available airtime at the time from a Customer Care Agent. The data was added, my airtime was reduced, but still, it appeared on my statement at the end of the month. I requested feedback on this too via email (refernce ***8) but still have not received feedback. This is absolutely poor service! I used to tell everyone that MTN had great service, but now I disagree with that statement!! Madeleine