This might probably the single most worst event in my life so far. Wtf does sunsetting mean? Gone forever?

The described their app as the "incognito wallet" ... so I thought it was a wallet not an exchange. You get a seed phrase and everything for it. There is an exchange function on the wallet itself, but I thought my funds were safe. Of course, I think I'm the biggest retard on the planet, because I had a small feeling that maybe I shouldn't keep most of my bitcoin on there... but it had good reviews on google play store, I couldn't really find examples of anyone getting scammed...