I know exactly what you mean, this has often happened to me over the years, when I have sent money and presents to family members and friends on birthdays, wedding, christenings and Christmas, not even a word of thanks in return, we are human and it is in our nature to be hurt when we do nice things for people and they don't even say thanks. I put it down to ignorance and bad manners on their part. Having said that there are many people who are very grateful for even the smallest gift, so we must keep giving, it's what God wants us to do, and He will make sure we get back ten fold.
It was a lovely thing you did, you will be blessed in other ways. God Bless !