<human>: Can you condense the text into a few key points?

My father was killed in a car accident recently.  He was walking and was hit by a semi-truck.  His injuries were pretty severe and upon arriving to the hospital, the doctors said he wasn't going to make it.  They did keep him alive long enough so family could visit him before they pulled the plug.    

About 20 minutes after they pull the plug, I show up.  A group of 4-6 people are there (intentionally being vague) and turns out that some of them are my siblings.  They knew of my existence but nothing of me in particular.  I knew nothing of them at all (I'm the oldest by a couple of a years).  None of us were close to my father because he was mainly a drifter and a drunkard; basically a public menace with nothing to his name (to my knowledge). 

We exchanged numbers and planned on meeting up soon.  But they keep cancelling plans and just avoid talking to me except for short text messages. This sucks because I know very little about my father and this could potentially answer a lot of questions about myself.  

My main questions are, what can I do to close this gap?  How can I communicate with them? Is there any reason why they're being short with me/avoiding me?
<bot>: Father killed by semi truck, trying to communicate with that part of the family, they keep ignoring me.  Now what?