Ignoring request

I have sent a request to have my Dad(who passed away)contract changed to prepaid to my Mom beginning Feb.After numerous calls and emails his nr was deleted. After more calls they will have it corrected and chang to prepaid. After a couple of days, with no service,we are back to a weekender contract. I have transferred money to the nr..so what happened to the money and why is it still on contract after 2 months. Autopage say they don't exist and can't help...Vodacom says go to who ever helped you. This is totally unacceptable! Who will be able to help and correct the whole issue?