Well, compared to the 30 bitcoins above it's peanuts but that's not really the point of posting on a community website, is it?
Anyway, this has been more akin to a community of bitmex reps, so in case a user comes here for help in the future, I'll leave a few points:
1) Bitmex is not an exchange, although there's a push to portrait it as such. It doesn't involve fiat at any stage. Bitmex is a gambling website. Submitting to their KYC demands makes as much sense as sending documents, that even most governments don't ask, to any videogame website which has its own currency.
2) They have every right to verify your ID.
3) You have every right to decline their requests for help in doing 2)
4) Breaking the terms and conditions or any other contract never ever automatically entitles the other party to keep your assets. Especially when there is no discernible damage. That wouldn’t fly on any reputable court.
5) Terminating a contract has even less hold on keeping your assets
6) If they say or imply they won’t allow you to have your money unless you do something for them, they are coercing you in exchange for a benefit which is extortion on most reputable courts, a criminal offense.
7) Suspicion is not proof. If they have suspicions, it’s on them to turn that into evidence. If they cannot prove, you’re being discriminated against.
8 ) If you’re concerned about anonymity, keep in mind you can nominate (hire) anyone to act on your behalf. If you didn’t give any info so far, anyone can own the account, given they have the right details. Professional names are not illegal.
9) Don’t waste much time on customer support or on their media accounts. According to experience they will likely delete your posts or give you canned circular responses. Try to contact the higher-ups which will be my next step.
If anything else, PM me.