Transfer of number of deceased person

the worst experience I have ever encountered from Vodacom after my dad past away. I am struggeling now 3 months to get there number transfered to my mothers name. now they just cut her off completely. 80 year old lady and she is cut off from the rest of the world and she is not 5 minutes drive from me. Terrible service. One said we can do all over email and phone, and then get new contract - BULL %%%%$$ ****. They just cut her off