MTN ****** charging me for a service I don't have.

On the 26th September I was called by MTN's upgrades department to upgrade my service from a monthly contract to a 24 month contract including a HUAWEI P8 Lite at an extra cost. The consultant promised that I would receive the phone before the 2nd October. I had given MTN a grace period of 5 days after the 2nd as the 2nd October was very important to me to receive this phone. I then called MTN to request a cancellation of the upgrade after the 7th October and told them to not send me the phone. I called again on the 17/102017, but nothing was done. I called again on the 31/10/2017 Ref: ********** 29, spoke to Nonhlanhla to cancel my upgrade, but nothing has been done. I called again on the 2/11/2017, spoke to Carino Refno: ********** 9, but still nothing has been done. I called again on the 13/12/2017, spoke to Primrose Ref ********** 85, and still nothing has been done. I am being charged monthly since September for a service I do not want because MTN failed to deliver on their promise. I do not have the phone that should have been included in the upgrade, yet MTN is still charging me the upgrade Monthly amount every month! This is absolutely unacceptable! This is *****ing from the man in the street! I am totally and utterly disgusted with the bad service and lack of integrity displayed by all the MTN consultants who have not honoured their word to cancel the contract of a service & phone I do not have! I have not been called by any manager in this period at all. Now I have no option but to cancel my Debit Order and they must dare to blacklist me for this! If this is how they treat a customer who has a history of more than 20 years as a customer with the same cell phone number, I do not want to know how they are treating all the other newer customers. MTN has done me a dis-service in a big way!