Disappointed at the service

My husband passed on 30 June 2025, I kept his line open as Im still winding up his estate, Iv been getting calls from his family, different companies etc.. Meaning the number has been actively busy and on the 3rd Nov 2025, I get a msg that the number is not working I must contact the sevice provider, I get to MTN and I was told the number cannot be activated and theres nothing they can do, a whole big organisation like this and I cannot get assistance, ITS AMAZING

1.How come a number get discontinued when I am using it? 2.How come I was not send a notification that the number will be discontinued? 3.I need the number to be open as Im still busy with the estate, its very important and I really cannot afford to not have this number at the moment

I need someone to help me get re-connected or re-issued with the same number