Green Lawn Sprinkler System Inc

Description of Work: Ronaldo, owner and worker came first a month ago to check sprinkler heads and open system. He charged $145.00 for 2 Sprinkler Heads $90.00 and $55.00 to open system - total Cash of $145.00. When we turned system on a few weeks later, some heads were broken and did not work correctly. I called Ronaldo back. He appeared same day. But informed me, that he has to replace 7 Heads at $45.00 total cost $315.00. He made me sign the invoice and he did the work. I did not notice that he wrote the invoice 7 heads at $45.00 = $315.00 but at the very bottom he wrote $375.00. He again requested Cash. I gave him 4 $100.00 bills and he returned me $25.00. I called him immediately to inform him of the mistake. He answered me that I signed the invoice and he will not return the money to me. He is a very arrogant person. We found the old sprinkler heads in the bushes. I will take him to small claim court.