suspending service for 3 month in 2016

I had my phone upgraded at the end of 2015 and chose a better package with MTN. However, starting 2016 for every new month they have suspended my services. Apparently they did not capture the price difference of my previous contract and therefore suspend my phone services.im currently not able to make calls, sms, use Internet or whatsapp. I went to them everytime this has happend and ask them politely to correct this error on the system. However this is the 5th time this has happend in this year alone!<br> <br> Is this due to incompetence of the company or just blatant poor customer service? I am in a profession where I constantly need access to the world around me, and in the most vital of time mtn has let me down and failed to deliver. Next year I am starting up my own professional brand I'm canceling all association with mtn, infact I would pay them to cancel my contract. #donotentermtn#mtnmustfall<br> <br>