I would agree… check the purchase agreement as you may be able to get up to 3% for liquidated damages but that will be your responsibility to collect it through whatever means you can or are obligated to go through be it mediation/arbitration or court.

You can try to stay in escrow and get an addendum where the buyers will pay for your expense due to the mistake they made but both parties need to agree to that. Try to hold a good poker face and threaten to cancel if they do not compensate you.