I was cheated out of a computer that does not work right

I got on craigs list and found a man who fixes and repairs computers, then sells them, he had alot of postings, so i bought a monitor, a keyboard, and a printer for 100.00. He promised to come and fix any thing that wasnt right. I called to remind him that i was waiting for him to come to my home and fix everything. it went straight to his voice box2 and i left messages, but he never called or came. Now i have a computer that needs worked on along with the monitor and printer. I am disabled and very upset for what he did to me so i hope you will please help me and take care of this problem, the mans name is Mike and # is 419-520-5377