Fed up with *** service!!!

I have now OFFICIALLY had it with MTN !!! I really dont even know where to start!!! I am a loyal paying customer of MTN for more than 2 years now, i really dont know why i didnt cancel this F-ing contract when i had the chance! Not only do i struggle every single day of my life with shat signel and no help from the so called customer service when i dial 808 but now because of not deducting my instalment when they should have last month i am financially *****ed for this month! I told MTN when i got this contract i get paid on every last day of the month, not before! Please tell me why cant you deduct my money when its available and not try and do it earlier like a bunch of *******. Now i got a sms casually informing me that i have a dubble deduction going off end of Feb, well guess what, i will not pay a cent to this company who is so greedy and wont even go the extra mile to phone me and just inform me of my unsuccessful debit order. Oh yes the best part is no one ever phoned me to inform me that my debit did not go off, why would you? I mean you have no sense of customer care at all !!!