Listing agent/Seller provided wrong information on MLS listing.

[Jas B.]

We signed a contract for property in Dallas area with $600 as option fee. During appraisal we found out that the Multi-family property was only 4500 sq. ft instead of 5500 sq. ft mentioned in MLS Listing. Obviously bank appraised the property 100k below what we had initially offered. Listing agent/seller refused to reduce the price much and we lost the option period money plus the fee for multiple inspections. Listing agent was also related to the seller. Can they be held accountable for the money/time we lost pursuing this for over a month? Had we known the property info. was so off we won't have signed the contract.