Daily tournament

Hi everyone! 

I’m having trouble finishing the tournament gem collection. It seems i need to qualify at least in 250th Place to win it, or try my luck in the mini game between rounds. I’ve spend 300 credits and never won the gem. Can anyone help me?

also, if somebody wants a friend to trade and send gifts, you can add me as a friend (just send me a message on facebook). My profile name is Madalena Catalão (i’m from Portugal).