Christians aren't perfect. They make mistakes like anyone else. I hope you can find it in your heart to forgive them. I think that is what they would do for you.
Maybe they didn't know they wronged you. Was it something really bad or was it just a mistake? Have you gone to them and spoken to them about it? Maybe if you were to forgive them, you would begin to understand the forgiveness God has for you. We all need to be forgiven, don't you agree?