Seller changed listing after offering full price to best highest

[Chad Gronan]

I offered full asking price on a property and listing agent/seller is saying deed issue. This wasted a few days, then they changed the listing to best and highest offer by a date that was a week down the road.  He obviously knows I will give full asking and now hes playing the market.  Is there anything I can do since he changed the listing after I put offer in?   I would have waiting until the last day had he structured the listing this way after my offer.  I really want this house and any help is much appreciated.