Change of ownership @ MTN

My children phone number is currently on my account and I wat to transfer their number to their own Accounts. MTN CustomerCare adviese me to go to a branch and that my children must accompanied me. Beauce 1 of my children are staying in Pretoria (I stay in Louis Trichardt), we planned a trip to Pretoria and visited MTN Atterbury Retail Park on Saturday 21 October 2023. We spend more than 2 houers at the branch, they were not able to complete the change of ownership because of issues (authentication) with their system. I was promise they will register a ticket to resolve this issue. It is now 4 weeks later (with numerous calls to the branch and e-mails to MTN CustomerCare) we are still nowhere with these transactions. The person what assist us on Saturday 21 October has been transferred to new branch. Every time I call the branch whey promise that they will investigate and get back to me. WHY NEVER DO! I called 135 on 16 November and according to the lady this transaction was canceled NO REASEN WAS GIVEN. All required documents were submitted to the branch. I am of the opinion that MTN do not know how to fix this issue. In my 27 years at MTN this is the most *********** service I received from MTN????