Charged for Data not used & messing up contracts

I have a business account with 9 contracts with Vodacom. Our account is normally about R3300 per month. We upgraded 3 contracts in January and took out an additional 4 tablet contracts. At the end off January we got an account of R10500. I send my debit order back and immediately called for assistance. No one got back to me. Then I send an email to the CEO of Vodacom and had good response which I appreciated. The lady informed me that all data will be credited on the 2 cell phones in dispute. I also asked her to make sure that all contracts must cut of when the data, call limit etc has been reached. A week later Vodacom informed me that the account is still not sorted out and will be cut off. I will also be blacklisted. Another email to CEO and I got response that it will be done. Then on 27 February we all got sms messages that our accounts are upgraded to a UChoose Flexi account. On 28 February we all lost our remaining sms's from February and no one could make outgoing calls. I have send 4 emails to Lerato with no joy. Vodacom doesn't care about anybody that has a small business. Please can I get this matter resolved. Surely it doesn't have to take more than a month.