MTN poor service

I went to MTN Gateway to take out an additional contract on 18 March 2022. I was told there was a problem with my number. I went back the following day and I was told that they will escalate to have the problem resolved. I have called the store over 50 times... No answer. It's been over a week, no resolution, I will be going back to the store again. Hopefully I get a resolution to my problem.