Contract cancelled yet term extended

Good day My contract was due for an upgrade and a lady from MTN called me to upgrade, I explained that I wanted to go in-store to upgrade my phone, but she was tenacious that I do it through her.

I upgraded my phone, and she said that it would be delivered. When I went home my wife said that it would be better to go in-store so that I can choose my own phone. I am 60 years old and need a basic phone and I'm not sure if the phone this lady upgraded me to would suit my needs.

When I went to MTN Eastgate, they said that I cant choose my phone and I should cancel my upgrade if I want to choose my phone.

I called ********** and cancelled my upgradev(***), the lady said it would take 5 working days. (this was over 2 weeks ago)

I went to MTN today and they said that the contract was never cancelled, and my term has been extended to 10-08-2019, an additional 2 years.

Now I have no phone and still on contract, I want the term reduced as I want to go in-store to choose my phone.

My kids are with with Vodacom and have been pushing for my wife and I to move, which I will if this is the service expected.

Please cancel the term so I can upgrade in-store