PLEASE HELP - MISSING GEMS

I tried "contact us" and the chat option but I keep getting an error message. My account was HACKED by my five year old while I was at work. I don't know how he managed to make six separate purchases in games and I don't even know what games it was in, but I was shocked to see he spent 363 gems!! I have been a member since around 2004 and never had this issue. Is there any way to get them back or to lock it so he cannot purchase these when his dad is watching him. I told him he cannot play the game when I am not home until I figure it out. I hope you can help me. I might make him his own account to play the simple games.

Also, my MERGE game has been glitching all day and not saving my progress. I left a message about that in the forum, and I believe it's being worked on. 

Thank You, MOSEAN2