1005 Square Footage Error - Week from Closing - Any Advice?

[Sadie Bynum]

Hello all - Newbie here. I'm under contract on a home I'm buying to live in and Airbnb the attached In-Law suite. The listing agent wrote that the house was 4,000 sq in his description, and the mls listing indicated 4288. One week away from closing and the appraisal comes back at value of sale price, but 1,005 sqft smaller - 3283 sqft. Asked the sellers for price reduction and they refused.

My lawyer is on vacation for the next few days and my realtor is stumped. 

What do I do? Is there any avenue for recourse or damages? 1005 sqft discrepany is signifigant, so I can not understand why the sellers would expect me to pay same price. The sellers and agent are not challenging the appraised sqft number of 3283 - just said that's what they thought it was based on city records.

Any thought?