Vodacom's ******* service

Our MD passed away in January 2019. In April his wife asked to cancel his number. Vodacom suspended the account which had two other numbers on, which were suspended. After emails and hours on the phone over the next 3 weeks requesting that the other numbers be changed to prepaid, Vodacom just deleted the number off the system. When we asked why, they said that we had a window after final payment to transfer the account or request change to prepaid. We paid at the shop and phoned the call centre who said they could not change it to prepaid as the number was not in our name, notwithstanding an email offering the change to prepaid as an option. When we call the call centre says go to the shop. When we go to the Vodacom shop they say we must call the call centre. Vodacom is arguably the worst company I have ever had the misfortune of dealing with.