What's wrong with me?

In the beginning of the year the police kept calling my fiance & me asking questions about my sister. I called my sister, Trina to give her a heads up, but that day she kept calling screaming & freaking out. She lives with my other sister, Lynn in Southern Florida. I have another sister, Dena in Chicago. The only way for us to get a hold of her was through Dena. Trina's husband kicked her out of the house along with Lynn. He told us that he was sick & tired of the drugs. They are in the process of getting divorced. I was worried since I am the oldest & was looking out for them. I called a few places to see if I could get her help to no avail. Now all of them want nothing to do with me. Dena said that I manipulated her into a situation she did not want to get involved in, and that I was just being vindictive. Trina's husband said he would have eventually done this because she was not listening. I do not feel like this is my fault, and I do not feel like I manipulated Dena into any situations. I told her from the get go that this is her choice whether she wants to call - and she insisted that she wanted to as she was concerned as well. I believe that it was her choice to get involved. They all have changed their phone numbers, addresses, and everything else so I can have no contact. How should I handle this situation with them?