I had an unlicensed person go into my house to a complete a job and provide accurate report in CA on a water issue and HVAC. He said all work for $300 repairs plus report with pics and $35/hr. It was no contract just oral we argued and got it to $275 for all work and accurate report with pics. He came out in 10 mins and did not give me an accurate report, hid facts and plus did not work on the HVAC just poked it and next day another inspector went in and reported work not done. I am still offering to pay $35/he per his ask and extra $20 as compensation to turn a hot water valve on ON. He threatens to sue and put a lien etc. Am I obligated to pay more and can he do this to us?