Why must premium Subscribers battle every few weeks, you should treat us like Royalties

I am on MTN Sky black unlimited contract and experience extreme difficulties with MTN every month, I should not have these difficulties every month where I have to phone every few weeks for you to sort out why I cannot make or receive calls, this is a disgrace why I have to try and get the help from another phone as my phone doesn't even want to phone a 135 or 136 number. My phone hangs and eventually terminate the call as it doesn't go through and neither can anyone phone me. I'm fed up with you pathetic service and have to try several times to get a service consultant that knows what to do too, do you employ low IQ people? First I thought it was my phone but I tried several different makes of phones with my sim card but it just won't connect. The MTN stores say nothing is wrong with my sim card and must be on your side on the system so why the H E L L have you not sorted this problem out ? ! ! ! ! ! Also sort the Bathurst cell tower out as it keeps dropping signals to where there is no signal for up to an hour, your coverage staff says there is no problem maybe you should send someone for a week to observe how bad it is here. Sort your house out or my next upgrade will be by your competition.