Upgrade Nightmare.

Since I upgraded two of my contracts with MTN I have had nothing short of a nightmare, due to the upgrading my credit limits were reset and my main business phone was suspended, Then because I had used up my minutes it was again suspended even though prior to the upgrade I would then just continue to pay for the minutes used but all of this had to be reset and now the value is reduced because the other two contracts were upgraded, why the credit limit is not reviewed at the same time seems to be lost with MTN. For the last two days I have not been able to access my mail or the internet from this phone as it tells me "error there is no internet connection", when I check I still have over 3GB of data available so I call MTN, I get told they have a network problem at the moment and that is why I am not getting my mail - for two days I ask, he does not know is the answer, If that is the case then why can I access my mail and internet with my Ipad while I am on this call and it is also on an MTN contract - no idea, cannot help, absolutely useless. As a client of MTN if you do not use a public platform you cannot get issues resolved.