Pretty annoying when it happens, but you have to move on and find something else to substitute the war/event with and take advantage of the pull (if possible), otherwise dismiss and hope it doesn't happen again. If it persists, just don't fight or involve your clan/team with the other.
My last fight with Legendz, Pieter gave us an awesome speech. You guys dominated today, great job. The level of discipline and organization in T0 is superb, you should be very proud of yourselves :thumbup: