Who called from 4077013587

Recorded messages from the "IRS".  I don't think so!

Says IRS is filing a lawsuit against me.  TOTALLY impossible!!   Scamming [***]!!!!!!!  Leave us alone.........

ME TOO

Got the same call. Why can't the authorities catch these scammers?

Because they are in India or Pakistan and the "long arm of the law" doesn't seem to reach them.  But take heart because some of their US colleagues were arrested!  Here's the news story about them.
http://money.cnn.com/2016/05/25/news/irs-impersonators-scam/