You should describe all your problems here, so we can give advice or conclusions from the problems you face. I understand that Bittrex is one of the top exchanges, of course they are always being professional with their users, if you can't get your account now that means there are some problems with verifying your account and data. Well Bittrex always uses data verification every time there is a big problem, they make sure it's your real account.
I think they already ruined their reputation when they started to lock thousands of people out of their accounts before they wanted to become compliant enough to add actual fiat trading options.
It must be done bittrex because this exchange is domiciled in the US, where they must comply with all strict regulations issued by the US government. Anyone who cannot verify their original data will have their account locked, until they are able to verify validly. I don't consider this a scam, but it's about compliance with regulations in their country.