Where's my coins?

Went to bed last night had 281 coins…woke up this morning with 121… what happened to my coins.,I pay the dam 10.00 a month for pass and my coins are gone…so with extra 70 daily that’s 200 coins gone… this makes me so mad, can we be hacked?? If not I want my coins back…or I’m not spending anymore money…

Also, you probably just used the coins and don’t remember.