Who's to Blame? Very Irratating

[Matt Shobel]

Hello, I recently rehabbed a house to sell and is now pending. When we listed the house, we put in the remarks that the house was sold AS IS. Inspections went fine, and we are about 1 week away from closing, but my realtor only tells me now that he still hasn't received the AS IS addendum yet and the buyer is refusing to sign the AS IS addendum? Who's fault is this and what can I do? I feel like I shouldn't have to worry about this as I specifically told my agent I wanted this to be a As Is sale. Am I over reacting?