Vodacom cheats customers!

December I got an account for almost R4000 almost R3000 for the Nov account of that was data charges. I have a call limit in place but somehow vodacom removed it and it never notified me that i reached my set limit. Then vodacom as they say as a gesture of goodwill offset the amount giving me advice how to not run over my account, ya right i have a limit. Come January i get the Dec account for the same amount and now im told now we cant help you or log a request to investigate as we already did so with your previous account. My account has never been this amount ever in the history of having a vodacom account for 6 years. I logged a service request 2 weeks ago and was just told we closed it on our system. sorry we cant investigate. the service at vodacom is pathetic and billing due to systems issues unacceptable. i will now log a complaint with the ombudsman due to the fact that i think vodacom cheats the customers when billing and they have a limit that the system conveniently removes! I am not paying R4000 a month when i have a limit! this is **************** and *****!!!!!