The absolute worst

I have been a loyal client of MTN for 20 years, and have not received such bad service ever until this year. I upgraded in March 2015 and wanted an iPhone with a higher memory capacity, The lady said I would have to upgrade my contract. I agreed expecting a bigger package with I higher price. What I got was a higher price but a package that quite frankly sucks. It has taken them six months to get my message system working, it still sometimes, when I check my voice messages \the number you have dialed is not available. I have dropped calls all the time. and even when I switch my data off (which I have to do all the time) it says I have run out of data. I phoned a few days ago as my data bundle was not working