Incorrectly billed

I got a quotation from Vodacom on the 20th of January to cancel my contracts, paid everything and submitted all paperwork on the 22nd after which they confirmed cancellation of contracts and conversion to prepaid on the 25th. I was unpleasantly surprised yesterday when a R997 Debit order came off my account from Vodacom. <br> <br> Tried to call them this morning and I was tossed from Prepaid, to contracts then given a *** number which only turned out to be after sales. <br> <br> Can I kindly have my money refunded and ensure that these D/O's stop???