MTN is ripping clients off

I just upgraded my contract with MTN, and Abigail assisted me with my online application.

In January I asked for a advertised Samsung phone and tablet. No stock. Abigail do not communicate with that there is no stock available in South Africa. When call the call center to check on the status of the upgrade there was stock.

February she convinced me to take a Samsung S21 also waited 2 weeks for her give w e a response. Now there is migration charges on my account?

Ask Abigail what is going on and she said that she will come back to me in an hour. Now 6 hours later still no response!

Can I please cancel my order and cancel my contract that I can move to a different service provider