<human>: Can you give me the gist of the text in a nutshell?

Ever since I (37M) moved in with my girlfriend (39F) over a year ago my family have made it very difficult to maintain a normal relationship with them.  

We just recently came back from a vacation overseas, in which I had the golden opportunity to visit, for the first time, the country where I was born, as well as visit my girlfriend's country and meet her family.  Before, during, and especially after this trip, my mom (68F) and sister (35F) in particular have texted and Facebook messaged us in a very hateful way, demanding us to take packages for family members overseas whom we never met or have a relationship with, complained that I have been treating my parents "like second class citizens", and refusing to talk to resolve these issues. 

We have both been present in their lives, attending family functions, visiting them when they are ill, etc. It feels like they are very jealous that we are having a good time. So if we say no to them or disagree to something they say, or refuse to do a favor, they either send these hateful, guilt trip messages or completely refuse to pick up the phone when I call. 

They are very selfish and unreasonable. Honestly, at this point, I believe I've done more than enough to try to restore this relationship. Any feedback will be greatly appreciated.
<bot>: Family is being unreasonable and ignoring us if we don't do what they want.  Wish they would acknowledge their behaviour and own up to it.  Help.