CEX.io has stolen my money as it appears so far.

I have account up112960293 and in December I have changed my phone and in the process I lost the 2FA app and I can't log in.
Guess what ? This played very well for cex.io as they probably have major liquidity issues !!!
I have opened tickets 574201, 546283 and others and they respond to these tickets usually in a few hours saying that it will be processed shortly and I need to send documents and proof I am the owner of the account which I kept sending again and again.

No response !!! and I am locked out for over 20 days now.

I guess this is the perfect scenario in which they can spend and use my funds w/o really any issue while I can't login to my account.

In the crypto world of millionaires I gues $2500 is nothing but hey, that's a deposit that I made from my salary and... there are no millions there.
I feel scammed and tricked but in the same time powerless to do too much.

Any advice of what I can do now from anyone?