owing money to company

I have been getting several calls from unknown caller whether they leave messages with numbers to call back or not leaving messages at all.  They harass me at cell phone, at work, and at home.  They have even tried my roommates phone and she does not owe anyone.  I would like to STOP calling my place of work, my personal numbers, and all friends and family members.  I don't them and they need to leave me alone or I will report them to the police. Please don't play with me and I will sue the pants off of you.  Thanks for your understanding.