Constantly calls my cell I do not know them!

Several calls asking for "Nancy". Caller hangs up when told there is no "Nancy" at this number.

Calls frequently.  I answered today and head talking and laughing in the background.  Could not understand what they said and they did not respond. I finally just hung up.

I called them back, first a recorder comes on and say's  "CBE" then a real person answer's. Its either a solicitor or bill collector.

I get calls from this number with no reply on the other end then they ang up.