Lost essences. Maybe hacking

I lost a bunch of shrieking essences of wrath. This happened at the same time someone tried to buy them from me. I checked my essence tab and not there. I'm sure I clicked decline offer.

Somebody tried to make one purchase of 7 of them. They canceled it or something. Then another purchase of ten. I declined that one. This happened yesterday I think. Maybe 2 days ago.

Ps. Play on xbox