Throttled account

Took out a new contract, we enquired weather the option we were taking would be sufficient for streaming purposes and we were informed that it would be. At no point did the sales person inform us that after 200gb usage we would be throttled and in order for the throttle to be lifted we needed to stop streaming for 4 days (the reason why we have internet). why do you not inform your clients properly before they sign up, we have no other option but to cancel our contract, because we can't work with a company that doesn't disclose all the necessary information. Sounds a lot like bait marketing...