Mtn totally failed me

My name is humbulani mukwevho, I've been begging mtn fron January 2022 til today for a prove of simswap forensic report or letter from their mtn desk, something that shows that I did Sim swap, I went to the shops, I got two letters but fnb want the forensic one, I've been speaking to bongi, but she's no longer responding to my emails, it's bongi. ***, ds is not on at all, mtn is failing to give me the letter that I asked from January, and they are not responding to me, my no ***