Poor service and inconsiderate

We have been using Vodacom for many years now and because of a few payments, Voda decided to delete our numbers. My mom took contract phone for me, my niece and my sisters, due to COVID the business was not doing great at all, but even so, she still managed to pay for our phones, missed a few payments and was handed over. She still paid the money and now we are told that we will never use our numbers anymore as they are deleted permanently. How can they delete our numbers without any communication? We have literally used our numbers for years and now we should just change everything, from work, schools, bank and literally our entire lives. This is unfair and I will never use Vodacom again. Worst network in SA