**** to on MTN Upgrade

MTN called me to inform me that I was due for an upgrade to my handset in November 2022. They called me about 10times before I actually answered. The consultant asked if I would like to do my upgrade telephonically, to which I agreed. I specifically asked her how it would work and she told me I would be charged my old contract fee up to the end of February when it expired, where after I would be charged the new contract fee. I agreed to go ahead on this basis. To my surprise and disgust I was charged an early termination fee on my December statement with the description Remaining Device Charge. I have spent an hour on the phone this morning trying to sort this out and was told an investigation now has to be logged Ref RCO353578. I have been a contract customer with MTN for over 17 years now and will be cancelling my contract when it expires. I do not appreciate being **** to and ****** from.....