Called my phone

A man named scott wilson (a process server), was calling to serve papers between 9am and 2pm tomorrow. Wouldnt tell me what for and couldnt pronounce my name correctly when he called. Wouldnt give any information what it was regarding. He called from 720-502-0115 phone number.

They called me was calling to ask where I was , in order to serve me with legal , civil papers .
When I asked how come you are calling from Colorado ,he hung up on me

They called me and said they were process servers and gave me a case number and told me to call 18555505719...when i called there they said they were from mitigation and that i had a civil suit pending for a 500.00 loan i got from a payday loan place..couldnt give me a name but if i paid 1589.29 i wouldnt have to go to court...I tokd them they were a scam because i never defaulted on any loan

Have received 2 calls in less than 24 hrs - they don't leave voicemails so assuming scam