Gems gone disappeared why

I just had 1179 jewels going to use 300 on an epic player and all of the sudden i have 379. What happened to them ? I am one of those players that dont get much computer assistance luck . I try to gamble a little today and. POOOOFFFF I cant gems disappeared. Help me please.

Go inside the game and send a support ticket.
Tell them the exact time of this happening to you, they will help you better there.