No service since Migration! And no answer to disputation!

I migrated my package from a Contract to a Top up on the 30th of April and on the 1st of May I couldn't use my phone anymore. It is now the 5th of May and it is still not working. Everytime I phone I just get excuses and it is obvious that no one really knows what the hell is going on! I also submitted a dispute about R400 worth of billed SMS's on my Invoice for March. I do not sent SMS's and even if I do there is no way that it will amount to R400. I also received my Itemized billing for March and on that it states that I only owe R20 for standard rate sms's. I will not pay the R400 and I will not pay my account until I have received feedback. I have not received any form of feedback regarding this dispute. I've been with Vodacom for most of my life and this is the service I get??? This is the service it seems everyone gets. It is pathetic and if i do not get answers i will just go to a different provider.