Forced to upgrade

Call center agents kept harassing my elderly father to upgrade hes contract that he didn't want to. Then on the 20th of Feb 2020 during another call during which he repeatedly said no and asked them to call back later they did the upgrade anyways. Now we have the to jump through so many hoops to get it reversed that we've just given up. I think these actions are despicable and MTN should be ashamed that their personal took advantage of the elderly!