Loyal customer very disappointed

I've been for years with Mtn this year since April I have been hounded to upgrade which I said yes to however agent didn't mention I will have to pay and early upgrade fee so I canceled then July I called to upgrade was told I can upgrade from 11 Aug 2022 called again then they said I mus call when my debit order goes off then I will qualify I did was assisted and agent said it's approved on the 30th Aug I have them a call to find out what's happening I got 2 different people that is saying I qualify for far less that's why it's canceled but I mus speak to the lady that assisted tried over 6 times and no one can transfer me only send her an email to contact me and nothing all I asked is for them to assist but kept getting told only Nadene can assist you further I honestly feel right now it's best to cancel my contracts and never recommend them to anyone else utterly dissatisfied and disappointed