SHOCKING SERVICE!!!

I received a bill of nearly R4500 3 months ago - Over the next 3 months my bill was the usual bill of between R1200 and R1400. When we received the first R4500 my husband went in to Vodacom to upgrade my cellphone. He was advised to change from Apple to Samsung. We agreed to make the change as we cannot afford R4500 monthly cellphone bills. He went back to Vodacom signed paperwork to increase my R658 package to a R1300 package which included a total of 5gigs. Our December bill arrived of R4400 ! We checked the contract and it has not been changed. Sandile from Retail Park Vodacom branch said he can see on the system that the upgrade was noted however not actioned. He lodged the query with head office which was 2 weeks ago and we have still not heard anything. He told us to put a stop order on our account for January so that another large bill does not go off whilst they are rectifying the problem. It is nearly bill time and we have heard nothing !!!!! DOES VODACOM CARE FOR ITS CUSTOMERS? NO !!! DOES VODACOM CARE THAT WE WILL NOT BE ABLE TO GET THROUGH THE MONTH WITH R5000 PHONE BILL? NO !!!!! We are moving our business THIS IS ******* !!!!!