Ways to Overcome Anger
Seek Closure Solve the Problem
To the best of your ability, do not drag anything on for the sake of winning or being right; its not healthy for anyone involved.
Just because we surrender to the external events and choose not to give them any more attention, does not mean that we sit back passively to let others step all over us.
Take action that will help you move onto the next step, and closer to resolution. Be proactive and thoughtful. The faster you can get the problem resolved, the quicker you can set yourself free, mentally.