Harassing company

This company keeps calling me saying I owe them money
They have the wrong SS# and call me a liar and hang up on me and now they are calling my family leaving the messages saying they're looking for me. I have blocked her number they just called from other numbers they just keep harassing me.  I haven't done a payday loan so I have no idea why there are calling me I just don't know how to make these call stop