Bad information

I have a wifi device with MWEB,december month I received a email stating that they will be changing to cell c, and my new amount will be R199 pm, also it said that the change is automatic and we as the consumer don't have to do anything, december I paid R199 no problem, today I got my new statement for R1100, it shows extra usage, and when I logged on to the MWEB web site to view my account it said, 0 data usage fro the month of december and 0 data usage for the month of january, so I phoned the call centre, the lady told me now, we must register on CELL C web site to view our new usage info, no one told me that and that was also not said in the email they send out in december, THIS MWEB ARE *****S, I advice people to NOT do business with them at ALL, they must be sure that I WILL NOT PAY THAT AMOUNT, they are a lot of *****ed people, they just want to tell the customer what they want to, I want to know if there are any other customers having the same problem.