I am a single mom. I hired an electrician to do some repairs and install some fixtures at my newly purchased economy house. The total work would have taken about 25 hours. He came a worked a couple hours, disappeared for weeks, came back and worked another couple hours, disappeared, etc. He put a supplemental circuit box in my kitchen and mis-measured it so it is too low for the cabinet that goes there, so it has to be re-positioned. He put some conduit for an outside entry light at my front door, but it came loose and presented an electrical hazard for my children so I had to get someone else to remove it. Over a 3 month period, he worked 15 hours in 2 -3 hour widespread increments. The last time I saw him, he indicated he would be back. Instead, he sent me an invoice for 17 hours (1 hr of which was his mis-adding) and a whopping $577 for "materials" which were not itemized. I had furnished all the fixtures and most of the outlets, boxes, etc. The circuit box he installed in the kitchen was $36.94 retail with 4 breakers totaling under $40. That leaves $500 of materials unaccounted for. I paid 75% of his bloated invoice with a note that I would pay the rest when he finished the work, fixed his mistakes, and provided an itemized list of materials. Today he sent a text saying if I did not immediately pay the remaining $577 of his invoice he would put a lien on my house! This is crazy! I've been patiently waiting for him to come back to finish. I'm the one who has the legitimate complaint! I expected quality workmanship done in a timely manner and I got neither. I am now left having to hire someone to correct his errors and finish the job he started. I do not want him to put a lien on my property for the disputed balance of his invoice, nor do I want to pay him money that I question is legitimate. What should I do?