what is MTN selling us ?

As a MTN subscriber and loyal customer , I have to say that I'm very disappointed with my recent experience. My Fiancé bought me an iPhone 16 on the 20th of December 2024 and on the 20th of January 2025 tried plugging in the phone to charge and it would not charge, I swapped cables and also tried using the wireless charger and the phone kept showing the iPhone logo then switching off and battery was overheating. My fiancé took it in and was told they will book it in and we will receive it in a month, which is so much of an inconvenience for me cause what do I use in the meantime ? Now I have to stay without a phone for a month. I strongly believe that MTN should give me a brand New phone and not try to repair the current one cause if its already giving me problems within a Month, then what's going to happen 6 Months down the line and 8 Months down the line ??? I'm really disappointed in MTN.