Vodacom - system, old system - no customer service

I am struggling to get anyone at Vodacom to help me: My one phone 's scontract ended and I want to migrate it to pre-paid. I have been phoning, emailing, I sat with a Vodacom consultant in a Vodacom shop. They phoned, they emailed. Still no joy. Its a M2 old contract on their system problem - blah, blah, blah. So disappointing. I would migrate to any other service provider MTN, FNB if you can get this sorted for me. I have 5 phones and I cant deal with Vodacom anymore. Blame it on the system approach is blaming who - Vodacom management and training?