I got multiple calls from this number.

That's the same thing that happened to me, they always call me more then once a day!

Blocked this # yet they still got through to my voice mail. Left a rather threatening/urgent/rude message saying I NEED to get back to them IMMEDIATELY

This number called me for the second time today ? Left a voicemail so i called back and asked what they wanted ...he stated it was for a Tanning Bed bill from 2012? Its 2017 and I'm just hearing of this for the first time? I thought this was complete Bull****!! I did collections for 8 years myself and these people are most likely buying old debt that has been paid  already or charged off!! DON;T LISTEN TO THEM AND WHATEVER YOU DO DO NOT GIVE THEM ANY MONEY!!

Called me multiple times.  I did not answer. Got nasty voicemail saying call immediately, couldn't leave details.  My accountant said google the number, probably fraud.