Both are at fault. Difference is you apologized and explained the situation. While the other side is obviously just in it just to ruin the server. While everything was going on. They were having fun advertising another server while taunting other people to join in both social medias and in-game. The group is also known for playing in every new server and take over card hunting for PHP purpose. I agree with your decision. In-game shouts are becoming toxic with their group in it.