Capped accounts are not capped

I upgraded my account and changed the data and call portion to a capped option.

I was ensured that I would not receive any massive and supprising accounts.

Yet I received a astronimical bill, as it was not capped, eventhough the contract expressly state that is is capped.

I tried in vain to resolve the issue, but once you raise the complaint you get cut off or transferred to a number which is not answered.