Rude person calling, probably a debt collector. They called me first but didn't leave a message, so I called them back and they were really rude, I asked who they were and why they were calling, the person said they worked for some company I've never heard of. Asked me if I knew some person, and after I said I didn't know the person, and asked why they called me,  the caller said that I can't prove that they called me [like caller ID doesn't exist]. I told them to screw off.