P.M.
I'd tell my daughter something like, "Sweetheart, this bassinet has caused a lot of hard feelings. When I gave this gift, I really hoped to cultivate good, happy memories. I hope you'll eventually be able to see that your feelings are not my fault – it wasn't my responsibility to get the bassinet back to you; I was just trying to help.
"I feel sad about how things turned out, but I can't do much to change the situation now, except to love you and be patient. I want to be here for you and your children into the future. My heart is filled with love for you all. You are upset, and it can take some time to settle those unpleasant feelings. But I'll be here waiting when you do!"
This is essentially the sort of message parents give to young children who are upset. They can/should be taught early that they have responsibility for their own feelings, that happiness is best supported by relationships, and not things, and that happiness is worth cultivating. Your daughter does not seem to have learned those lessons. But as her mom, you can demonstrate how it's done. It's never too late to start.