phone con, unsolisted calls

These people call me daily and refuse to stop. I have 20 of their numbers block and they still call daily. It's a scam where I send them whatever they can get out of me money wise and they will send me millions. I have begged and pleaded with them to stop and since they are in Jamaica I can't do anything about it. They call all hours of the night. They get one of my employees names and then ask for that person over and over. They are seriously driving me crazy!!