no end to this bad/ussless service

i have logged hundreds of complaints, phoned millions of times and still no service from mtn. I asked to cancel the contracts that i app**** for in December 2015, why would you cancel only one if I app**** for two, do you not understand CONTRACTS.due to your half job service, again my other lines are blocked. do I have to spell it out for you. ONLY THE LINES FOR *** AND *** MUST STAY, CANCEL THE REST!!! I pay for this service, why do I have to keep up with this poor service, cancel the line and credit my account, activate my two lines, and make sure this doesn't happen again, I don't have time to tell you how to do your job every month. Besides the inconvenience you cause me, you are now affecting my credit record, and I will not stand for this. I have had it with you, I want my lines activated and this mess sorted within 24h or I will take legal action, you are forcing my hand.