Help! How to keep the Judith Leiber bag?

I got one about one year ago. I dont use it much, just in special event, and for the rest, i keep it in the dust bag. But the crystal keep falling down. I kept all the piêces which fall out but not sure how to stick it to the bag, cause where I live dont have any Judith store. And what should i do to make the crystal stay last forever? Please, give me some adivce.

Thanks

 

Help, pleaseeeeeeee