I had provided service to a mortgage center(bank) on a property all authorized work by the bank was paid . The buyer contacted me to provide additional service , since he was still waiting to close escrow and did not want to waste time he asked if i could start the work and as soon as he closed the escrow he would pay. i did not obtain a signature on a new work order from him because he refuse, saying he was not legally the new owner until escrow closes and declare him owner , then he be able to make payments for repairs on that property . At this time the buyer and the agent do not respond to my calls, emails , etc. The time frame is almost closed just waiting on them to respond the work was done back in May 2018 . Please advise what can be done at this point