Before you embark on a journey of revenge, dig two graves. Meaning. You are poisoning your soul and the person you seek revenge against, as you will both share the same fate.
We've all been wrong badly one way or the other, maybe by the people we love, family, friends, acquaintances, etc. But then seeking revenge against these people can lead to your doom. Yes, they might deserve it, but then, it will come back around to you. Try to take your mind off the situation and forgive the person. Or you can try to put yourself in the other person's shoes. Let them know you are different from them. Remember, you have also done something terrible to someone. Nobody is perfect.
If someone does something terrible to you, the best thing to do is to reward them with a good deed. This might be challenging, but remember you are also saving yourself in the long run. Don't pay evil with evil, as this will make you an evil person too. So, don't seek revenge; you will just hurt yourself more. Leave the battle for God to fight.