It's been going on for years!

I am on a prepaid Cell C account. I have been paying R30 a month for the last year. without warning, they increase the price and tell me my account is in arrears. Problem is, my older brother, who lives in the USA, has the passwords for the accounts (they are in his name) and the call centre agents never ever let us access the account so they can make changes. This has happened at least 3 times before and Cell C are forcing Me to pay for things WHICH SHOULD NOT HAVE CHANGED. They keep cutting off my cell line and i think they'll cut it off tomorrow, ON VALENTINES DAY. PLEASE HELP ME CELL C. If you cut my account line tomorrow, me and my family are switching providers before March.