where to report bugs?

I think you're confused...it doesn't cost donuts to add friends, only to speed up the mission. And chances are the person who sent you a friend request cannot be added because they have already hit their 100 friend limit. Try posting your name in the Whacking Day Friends Request link and you should get a few friend requests.

http://forum.ea.com/eaforum/posts/list/9434900.page