There is no way to force a seller to accept an offer. They may be in the process of taking the house off the market.

If your offer was not ever accepted by the seller, I don't believe you can do anything except perhaps submit a more enticing offer.

I'd resubmit your offer. It all depends on how good the communication is between listing agent, buyers agent, seller and bank. We are handling a good amount of short sales and there is specific legal language that should be in your offer to protect you.

I'd be happy to assist if you have any further questions or comments.

Thank you.