Got a call from this number. Left no message.

I received a call from this number but no message was left, when I called back
the recording said it was ERS or Enterprise Recovery Systems, in other words
a debt collector.  

I got a call from this number and the guy asked for my deceased daughter. When I asked him who was calling as I was shocked, he said he was calling from the Internal Revenue Service.  I know better, I hung up.

Received call, no message left. Also received calls from 313-221-5754 and 313-221-5761. 5754 left message "this is Oliver Houston with All Tram Education. My call is from a debt collector. Please give me a return call at 1-800-377-1904, select option 1. My extension is 3147. For your convenience I will be in the office today until 6 pm."