855-687-1981

They called my mobile but left 1 second of vm and it sounded like a very deep voice.

Caller ID says "Legal Services".  
Called twice this morning.  No messages left.
Apparently not important enough to leave a message.
Adding it to the blocked list...

This is CCA I don't no who they are suppose to be or what they want.  I assume however if it was something important or legitimate they might leave a message and possibly send some mail to you.  Or else they are your classic bottomfeeding collection agency that wants to harass and intimidate to make you pay.

got a call from thisa deep voice guy stating he was coming on Thursday to serve me papers and if I needed to know why then to call this number 855-687-1981...just wondering if this is legitimate or another collection scam caller

Called me to say I am getting served a legal affidavit to be served papers to appear in court! Now if I'm not at home then they will show up at my job and serve me then! They won't send me any legal documentation, they said, so I'm trying to figure out what's the hell is going on!

Its a scam.  They are trying to scare you into paying a debt you don't owe.  Ignore them.