Complete Service Failure from MTN.

After numerous phone calls to MTN's Call Centre on "135" over the past 3 months, I still have numerous matters that have not yet been responded to nor rectified. Issues range from debit orders not going off on agreed to dates and in some cases not at all, to numerous promises for Supervisors and or Management phoning me back after being belittled by Customer Care Agents, to call being dropped and or cut off, or being placed on hold for 45minutes without any body again picking up.....This all point to gross breach of contract from MTN....