One of this companies interpreters named Corinne came into our office claiming to be the certified translator for two of our tenants. Corinne was extremely rude and demanded we give all the tenants money back even though we were operating in harmony with our contract. Corinne was not translating but rather was advocating and border line acting as an attorney. When we would not comply with Corinne's demands she stormed out of our office and slammed the door on one of my employees calling her derogatory expletives. Corinne has also now called our office 5 times threatening to put us out of business with all of her contacts in the community. Corinne's behavior was not only unprofessional and unethical, but actually illegal considering she is a licensed interpreter and not an attorney. We later discovered that Corinne is a close friend of the tenant so she was likely just trying to bully us into giving her friends money back. I don't even know if she was doing this through her company or just trying to help out a friend on the side, but whatever it was Corinne was way out of line. In her phone calls to us she hung up on me multiple times and told me "she would put us out of business and have my job, and put me out on the street". Also worth mentioning that in all of her threatening phone calls the Tenants were not present which begs the question how is she translating for someone who isn't present for the conversation? Really frustrating individual to work with and very unprofessional, rude, and out of line.