Pathethic unprofessional service provider MTN

MTN send me an sms on the 17/11/2018 reading as follows "Yello, In our Efforts to continously improve our customer experience MTN will be changing the date on which your inclusive value, data bundles and value added services are being provisioned on the 17th of every month ,Your debit order date and payement due date will remain unchanged. we dont anticipate any interruptions to your service or billing during this process." and on the 19/11/2018 i recieved another sms from MTN stated as follows " Yello. We've had to suspend your ability to make outgoing calls due to non-payment of your MTN account. Please Pay R816.12 with MYMTN app or via ABSA FNB or Standard bank.Select MTN and use A ********** or ********** 283 as your payment reference". I have not given consent nor have agreed to the above as my contract payment date is the 28th of everymonth or before the 1st of every month my data and airtime i always recieved on the 22nd of each month. since the above sms as been recieved my cellphone as been suspended which when i spoke to the consult last month she advised it will not be suspend next month and yet again it has been i have had so much bad customer care experience with the call centre and when i asked why my fone as been suspended i was told i was in arrears i which i have never missed a payment at all i have had this phone for almost a year and always make payment on time only for MTN to inform me now that when i took the contract out i was one month behind with payment and because i make a cash payment and not a debit order i have to make the payement now...I have had a contract with MTN for more than 6 years and after every 2 years have renewed my contract with them. Round about in february 2018 i renewed my contract with them as well as took out two wireless wifi on my cellphone number when i took the contract out at the tokia blue route mall MTN they advised me that i would be one month behind with payement (which i was aware of as it was the case with all my previous contract prior) and if i should end the contract after 2years or cancel the contract i will pay an extra month due the the month that will be behind im fully aware of this and know i will have an extra month to pay should i cancel or renew. the call centre agent advised me beacuse i cancelled the debit or i need to make the arrears payment which does not make sense since i started off the contract making a cash payment due to my previous contract where MTN would debit more that what is due on the contract i cancelled and agreed to make an instore payment each month. I requested that the call centre agent call her manager or supervisor is incharge after being put on hold for quite some time to returns only to tell me that he wont come to the phone if she already explained to me why my line as been suspended the service is recieved is pathetic and disgusting you get oover charged with data and airtime and get ****ty service when you need to dispute any issue you have with MTN they quick to assist you when you want to take out a contract but dont disclosure any of the fine details or concern that would be damaging to you as the use you depends on a cellphone line to run a business im beyond gatvol and furious with this babd service i continue to recieve with MTN and if you want to cancel they make deals that they can stick to., yet i just recieved anoth sms on the 18/12/2018 at 11:11am reminding me that i need to make payment within two days or my lines will be cut again after i explained to the consult that my contract is due on the END of every MONTH. ANGRY ......****ED .....ANNOYED........ FRUSTRATED.......and the misleading of this service provider