I keep receiving phone calls at work from an organization called Premier Portfolio Group. The person calling is XXXX XXXX. When I first spoke to him I informed him not to call me at work. XXXX calls back the same day and says '' I KNOW YOU TOLD ME NOT TO CALL YOU AT WORK BUT '' I then hung up on him. He continues to call daily and when both of my co-workers answered on separate occasions, he calls them a liar because they tell him they are not me and he tells them they are me and gets short with them. This company has gone too far. Numbers that they use : XXXX, XXXX, XXXX, & XXXX. I have asked them to mail me a letter that states the information and debt they are collecting on. They refuse to send anything. I want my credit card info, my payroll department number. I am severely being harassed. I am ready to notify the FBI to investigate this company. They are causing me stress and making me look bad at work.