Bad service from MTN

I bought an iPhone 7 from Fairland MTN Wesbank building on the 08th July 2019. I started experiencing problems with the phone on the 17th January 2020. I took it back to the store and since then I haven’t been assisted. I feel very disappointed by their level of customer service. I was given a waiting period of a month and I still haven’t received my phone. It has been over a month now without the phone and I feel that it is very unfair as I have been paying monthly instalments for a phone that is not in my possession. I would kindly like to be refunded for the month that I paid for the phone but not used it. Can I please be assisted as I am in need of my personal phone and I cannot take the ups and downs of going to the store and hearing excuses. Can someone please give me answers as now I am being told to take the phone to iStore once it is brought back (it will still be unfixed), I am confused as I don’t know where that phone comes from and I feel that it is really unfair for me to take it myself to iStore again. It seems that your staff at the shop have no idea what they are talking about hence I decided to write to you. I really cannot be paying for a phone that is not in my possession, I was not even given a courteousy phone to use which still does not make sense.

Can I kindly be assisted as this is of urgency.