Vodacom consistently *****ently billing customers

I recently recieved a bill for a data contract of just under R30k with no warning that the data was depleted. The bill is normally around R349 pm. I now want to cancel my contracts and move over to Cell C on the unlimited deal. I advised Vodacom on 23 April that i would require the numbers to be ported. I recieved an email to tell me my request was being processed. I moved all contracts over and signed with Cell C. The ports were not going through and i was advised from cell C that Vodacom were still awaiting acceptance of the quotation to cancel, this was the first i had heard of it. On multiple attempts from myself and Cell C we eventually got the early cancellation quotation and it was in excess of R80**** This is rediculous and does not fall in line with the CPA.