--snip--
I'm sorry for your loss and i only can you suggest to contact them publicly (e.g. using Twitter or Reddit).
--snip--
That's about the only advice that can be given... In the past, they seemed to somewhat care if they got negative public feedback (probably because to much negative feedback might decrease the number of people that open an account with them, and less users mean less people to scam).
They have an account on bitcointalk. I don't know if it's still active, but in the past i've seen people getting their own money back after making big public scam accusations on bitcointalk, twitter, reddit, facebook, trustradius, google appstore,... If you want to have *any* chance, i'd advice you to go big... Tell the truth, but tell it on as many places as you can.
I've adviced people to lawyer up in the past, but for some reason i've never heared anybody succesfully sueing them, i don't know where their headquarters are located but it's possible it's in a country where it's difficult to sue somebody over crypto.
By the way, if you ever succeed in getting your money back, get out and run... Move all your funds to a non-custodial wallet as soon as possible... Sure, they'll tell you that your account is now active again, so you won't have problems with them anymore, just ignore this and move all your money. You have now learned that custodial wallets (like freewallet, which is more of a very shady exchange than a wallet anyway) can lock your own money whenever they want to... Don't fall for this again.