Several calls a day and just hangs up

I get calls from this number asking for some Bohdan blah-blah-blahsky. Its not me, I dont know this person and its not the first time this guy threw my number to people he had apparently ripped off. Good times.

I just confirmed it's a collection agency.  UMC Healthcare Colections.

called back and said please wait for a representative.  "Your call may be monitored"