My two cents, nibdip.
At first, he was KSing you. imo once you leave the map, it's his. It did not look like he was KSing you and no offense, that map is huge as hell. Learn to share. So once you went on your pretty little bishop, the tables turned. You handled this poorly, the GM's shouldn't do anything for this situation other than make fun of you.
And to the other people who are saying, "It's just a game," KSing is punishable.