Another IRS scam. They call up pretending to be the IRS and claiming that a lawsuit has been filed against you.
Here's a news article from the real IRS.
https://www.irs.gov/uac/irs-warns-taxpayers-o ... unes-gift-cards

If you want to file a complaint against the scammers, go to https://www.treasury.gov/tigta/contact_report_scam.shtml