Ridiculous bill

Normally, our account is limited to the contract fee, and we seldom exceed the call and data bundles provided in the contract. Last week, our bill was R 0.00 - Yesterday we received a sms indicating the bill is R4600. We went to a Autopage store, and the assistant cancelled all the \subscriptions"on the account - none of which we subscribed to! We were assured that the matter was solved. Today (24 hours later) another R800 were billed - increasing our bill to R5400! <br> <br> We phoned the call center ***) and was told that it is our problem. We are and will remain liable for the account"