MTN are money ******* and debits without debiCheck mandate

My data two data contracts have expired. I sent an email request a month ago to have the contract cancelled but to my surprised at the end of the month i get charged with a bill for double the amount. When i called into the call centre I was advised that my contract said this is allowed. I asked why there was no attempt to contact me and advise me of this when they could send upgrade SMSs in abundance but not a single SMS to confirm the service fee will change the consultant said they dont need to as it is my duty to refer to a contract i took out 2 years ago. I asked for a manager and the managers were in a meeting and the lady then transfers head office. The line got cut when i was transferred to HO. I called back and the 2nd lady gave me the direct number before transferring me to HO, the line got cut. I called the direct number which was once again the retention team and not HO who could not assist and said the managers are in a meeting, the 3rd consultant tried transferring me though once again to HO. Line got cut. The 4th consultant attempted transferring me through but transferred me to another retentions agent who said the only option now is for him to send an email to management and have them call me back within 24hrs. I waited the timeframe and got no call back. When i called back to follow up as to why they are not calling me the agent advised the manager are all in a meeting. I have no resolution to my query. All i know is MTN consultants are working remotely and cannot see their managers and have been advised they have This seems to be a tactic from MTN I need to know: 1. Why my account was ********ly debited (i did not authorize a mandate and it could not have been a migrated mandate as the previous debit order was half the amount)? 2. Why your managers are always in a meetings (when do you do your job)? 3. Why your consultants do not have access to transfer calls to a manager (its a call Centre, surely there should be an escalations/ manager queue or for the least manager extension)? 4. Why no one made contact to advise me that the debit order would be increase? 5. Why my email request to the contract being cancelled was not fulfilled? 6. Why no one has made an effort to call me back timeously?