Saved family €4,000, shockingly ungrateful

My other half's brother and his girlfriend moved to Australia in May 2012, we offered to store their possesions in our spare bedroom so they didn't have to put it into storage, saving them €2,000 a year. At the time when we offered to take the stuff they were going for a year. However they stayed longer abroad and these belongings are due to be taken tomorrow morning. So we have had the stuff 2 years, saving them €4,000.

What I have an issue with is the fact that they haven't spoken to us or contacted us in those 2 years. When they decided to stay longer abroad they told my oh's parents who told us. We had to move house soon after this as our rent went up and we couldn't afford it, so we had to move all their stuff with us. They have a lot of stuff, it fills a double bedroom floor to ceiling. We were never botherd by this, ok it was annoying to move all their stuff as well as ours but they're family. But we never got a message to say thanks for taking the stuff for another year, nothing.

But possibly the worst part of this and the part that makes me want to say something is that they have been sending presents to the brother's 2nd cousin and have ignored our daughter who is his niece and goddaughter. It's not necessarily the lack of gifts but they don't even send a card or a message on Facebook for her birthday or even to ask how she is. While they send the cousin easter, christmas and birthday presents. These children are the same age and I honestly think leaving a child out is dispecable.

They moved to England in Janaury, again they planned to come home but chanaged their minds and didn't tell us, and didn't feel the need to take their possessions back. It is only because we are moving to a different county that we cant keep their stuff any longer. When we told them, again, no reply but they spoke to oh's parents about it, saying they were broke (both working full time, one in a manager position, the other on commission, while living rent free with family) oh's parents offered to pay for a van they could drive over to collect their stuff, they said no and arranged a courier to bring it over for them instead. I was happy that it was going and I wouldn't have to think about it anymore, until the last 2 days.

Yday while we were packing up our house, more of their stuff was dropped off. We were never informed about a drop off, a man turned up with a van unloaded the stuff and said this was to be added to the stuff being removed by the courier. My oh's father came over that evening and took a picture of all their stuff, which barely fit the room. Saying it was insane and they at least owe us a night out. He then put the picture on facbook making a joke about them opening a furniture store. They got mad. The girlfriend left a comment about how she would prefer to see a pic of our daughter as she hasn't seen any in a while and this is were my blood is boiling. They have ignored us and our daughter for 2 years, not even saying thanks for all the stuff we have done. They never comment on pics of our daughter (of which their is plenty) but are all over the cousin, yeah I know petty facebook but the fact that she wrote that like she pretends to care is driving me insane. We even had to write up an inventory for the courier of their stuff, measuring every box and what the contents was. I e-mailed them this last week, I was very friendly asking how they they were, hope the new job was going well. I then asked them to let me know when the courier was coming, again they let oh's parents know and not us.

Should I be angry?, should I say something?, how would you feel?