Hello, I did a job for Trimming a palm tree in a home owner backyard December 20th. The orginal estimate was $175 and a verbal agreement. Once I finished the job, the owner was happy and even help me load up palm limbs to trailer. He then paid me $200 instead and told him thank you and was on the way. Now during the El Nino storm, two small limb that broke over he's claiming its my fault and keeps harassing me on Facebook and Craigslist saying it my fault, even as far as putting my wife medical condition on Facebook. Now he want to sue me for $200 and demanding payment back or take me to court in California. What can i do in the situation. Thanks