iPhone 7 that has been on MTN repairs for 8 months

Hello Peter, I took an iPhone 7 cellphone contract with MTN in November 2019. In January 2020 the phone went blank and froze screen. I took it back to MTN Pavilion, I was told that the phone failed warranty tests cos it had a scratch. I was then promised that it will go for repairs.

Up to today, I am paying for the phone that I do not have. It's almost 8 months and I'm very frustrated. Please help me.