How do you make "peace" with friends who are not talking to you?

Three of my friends (who also know each other) are not talking to me. It started with one, and then somehow she got the other two on her side. I still feel I did nothing wrong, but I apologized to my one friend who started this, and said to her I'm sorry if I did anything to hurt you. I still don't get what the problem really was. Anyways, all of this commotion started after I got married, I notice that these girls dropped like flies. I was still trying to keep in touch, even before but they would not answer my calls. I stopped calling the one friend, but I still tried to call the other two and it was the same thing, not responding to me. So, I want to get in touch with the other two and make peiece. How do I get them to listen to what I have to say? How do I get them to call me back?