Dr Ravee Chand Can I File A Legal Action ?

Dr Ravee Chand wanted to purchase a rental property that I had a contract on. He wanted it up-graded extensively before he closed so he could get a large enough appraisal to pull cash out right away at closing and avoid a refi- fee . in addition he wanted my short term resident moved out and a 2yr lease tenant in place also before closing ,so he would never have to take a payment from his pocket. I did what he asked and spent $18000 dollars doing the up-grades and tenant moves . of which he only paid $15000 of. He got to the closing table and demanded the 15000 come off the un-upgraded discount price ! He never closed! My time on the contract I had was to expire very soon! making it impossible to sell it to someone else. Now he wants his 15000 Back for the Upgrades This does not seem fair or reasonable to me . I have already lost all the money I could have made selling the contract to someone else with the property AS IS. . Can I file a Legal Action