Poor or rather no customer service

Good Day, I have been calling the customer care number since Monday (13.04.2015) to sort out insurance and the call kept getting cut or not going through. Finally got a response via email but put on the wrong option and charged the incorrect rate and no one has corrected the rate after I sent an email advising of the error. Also after my upgrade on the 11.04.2015 I had been without internet access since Tuesday (14.04.2015) morning. I was advised that data is fine and there is no problem on MTN side. I went to an iStore and my phone is working perfectly with another networks SIM card and on Wi-Fi. I was without the internet or any of my services for over a week which I had been billed the entire month for. I am highly irate as not getting any service. When I called 808 the calls get cut after being on hold for what seems like an eternity or the consultant say they can't help and I must call 1555. However it was that my package was not migrated properly. Now when I have called to dispute my invoice they do not understand what I am saying and do not want to let me speak to a supervisor or complaints. I logged complaint *** on the 17.04.2015. Still have received no response.