Contract dispute

The issue stared when I did upgrade on my cell phone contract line *** that was due for upgrade in Feb 2021. I did the upgrade and they delivered me the wrong color of the phone I ordered, and I notified MTN, I was advised to return the phone to MTN store I did return the phone MTN Carnival Mall. And when I followed up on when I will get the correct phone the consultant she told me that ones I have retuned the phone is like I have cancelled the upgrade and I must upgrade again, which I agreed to, but she went on to upgrade the wrong line *** which was never mentioned in our conversation. There is no way I can upgrade this this line as I was not even using it. And after I have discovered that she upgraded the line that was given to me as promotion. I took the phone for this line back to MTN head office. And up to this day MTN have not send me the correct phone they still billing me for these two phones that I have returned. I`m currently paying my contract manually and the amount of R 600.00 Which is for the lines I’m due to R***112 and my Rooter R200 no *** pay as per my contract before this wrong billing started.

I would like MTN to clear this incorrect billing and send me the correct phone for my main line ***). MTN should remove this line ***) out of my name because was given to me as promotion. And I have never used this line. Despite the numerous attempts to get the issue resolved still on going. This is my last resort to get this matter resolved.