Not taking customer seriously

On the 1st February 2024. My Sim card just lost network connection. On the 2nd February I went to MTN they told me the number it's with TFG. On the 5th I went to the store to request some swap. Unfortunately they used an old form but I couldn't know that. I waited nothing happend the following week on the 15th I went to the different store to request why was my Sim swap not approved, I filled other forms which were not filled correctly, on Monday the 19th February I went back to do a follow up only to be told that it was rejected then filled another papers. Until today i still don't have a number that's working. Why would I suffer just to get a Sim card replacement? And seems like nobody care about the calls I keep missing.