Housurgeon Inc review: This company has been overpaid and they wanted to get more money from me

I have hired Housurgeon Inc. to do some accounting work for my company. The man with whom I worked didn’t complete the work and as it was mentioned in our contract, he needed to pay back the sum, which I have overpaid him. But this person didn’t want to return money and started to threaten me. After 3 days I got another bill from this man. So, he was overpaid and wanted to get more. Terrific. I started lawsuit against this company.