Business ProfileforInstall It Guy

Found the business Installitguy owned by *******************************(aka *****) on FB marketplace. On 06/24/2023, his initial visit for a quote on a home improvement project for my condo, while I was showing him the apartment, I had a near pass out situation and he was really helpful, promptly called 911. Was really impressed and asked him for a reschedule for 06/26/2023. After the visit on 06/26/2023 he provided me with a quote and an invoice of $2000 and mentioned that I pay him $500 in advance so that he can reserve his time for the following week. On 06/27/2023 after both ends agreeing on a revised task list at same price, I hired him by paying $500 advance via Zelle. He himself promised to start the work on July 4th. On July 3rd he texted me saying he was not feeling well and will have to move it to the weekend. I was considerate and wished him well. Over the week we discussed and he committed on the following schedule for the work at at my place: Sun- Jul 9 Wed - jul 12 Thurs - Jul 13 Fri - Jul 14 Sat - Jul 15 I agreed and requested him no further delays because it would affect my other scheduled tasks. On July 8th he texted saying he still wasnt feeling well and needs to push it further and will be starting on Wed July 12th. A little concerned I still said ok and we decided to meet on July 11th at 5:30 at the apartment so that we could go over the details and also give him the key. On July 11 he never showed up, has been unreachable on his mobile via call or text till date. I asked my friends to call and txt to see if they could reach him but in vain. No reply to my email. Wasnt reachable on ******** marketplace where I originally found him. Reached out to the business via ****** Maps Chat and on July 12 I get a response Refunding soon we have a family emergency had to go out of ********************* refund request for $500 was declined by him on July 16. All further attempts to reach out were in vain. This is my final attempt requesting a full refund of $500 ( since 0% work was done) else I will be forced to file a legal complaint.