wratchgazer

Hi First of all i want to describe situation. I had my werebeasts upgrade on second level., therefor i was looking for the last piece - fourth werebeasts. So i wrote into chat and a guy aproached me. He said what he wanted in exchange and we went into trading window. i put my card he put werebeasts. We both accepted the trade. But the result is kinda odd. This trade erased my two upgrades from the werebeasts and what more, i havent got the traded werebeasts and it erased one more werebeasts of mine that i already had. The card i was trading for disapeared tho. What should i do?