What kind of proof can we have if we need to sue Binance or any other exchange

Hello binance users

I wonder if you ever get your funds blocked by Binance, what measures can you take in order to recover them? I mean, if they block you access to your account, and you have no way to proof how much money you made there, because they have all the records.

What ways do we users have and what real guarantee does Binance offer?

Also, where is the binance contract, is there a proper contract we can download, so we can give it to a financial lawyer for examination?

If binance offers no legal guarantees for its customers, its just another casino and people should withdraw all their money from it.