MTN Phone replacement

I am very disappointed with regards to manner in which my issue is being handled. I am battling to receive replacement for phone that happened to have a problem within a week of online upgrade in May 2022. Phone was sent back to Maponya Mall MTN on the 11/06/2022 and I was meant to believe it was booked for repairs immediately but to my surprise it was only actioned after several follow ups on the 3rd August. I again had to follow up with repairs dept on the 5th August and they advised phone dead approved for replacement. Now it happens to be a hassle to receive a new phone but debit order is running, I am actually paying for NO SERVICE AND NOBODY CARES. FROM SALES CONSULTANT, STORE MANAGER, MTN CUSTOMER SERVICE, REWARDSCO MONDO, MTN BOARDS COMPLAINT. MY LAST HOPE IN CONSUMER GOODS AND SERVICES OMBUDS, Hopefully I will receive some help.