Disgusted and Appalled

I complained on the 3 September 2015 about ridiculously high data usage after upgrading my cell phone contract. Up to now Vodacom have not come back to me with any solution. I tried calling them to cancel my cell phone contract but i would need to pay them the monthly fee until my contract expires. I am absolutely disgusted and appalled by Vodacom's attitude towards their loyal customers!! They have a bad habit of over charging customers for data usage when they upgrade their contracts - non of which gets explained to you when you go in to do the upgrade. You do nothing differently to what you normally would and yet you get hit with exorbitant bills and all Vodacom can come up with is that it is data usage. You would be amazed at the amount of people that this has happened to and we can do nothing because if you don't pay up they simply cut your phone! I cannot wait until my contract expires - i will definitely not be renewing my contact with them!!