kate spade new yorkWomen's Akira Polarized Rectangular Sunglasses

I am thinking to purchasekate spade kate spade sunglasses? but not durable, can i return it to amazon

i have only worn mine a few times and thethey fell apart?

i ordered theses a few months ago and the gold piece on the side fell out how do i use the warranty?

Are these eligible for a 1 year manufacturers warranty?