the call says final call from the IRS...When I called the number back they said they were the IRS, but I don't believe them.
Foreign accent.

IRS SCAM
DO NOT ANSWER
DO NOT CALL BACK

You should never return these types of calls.
If the IRS wants to contact you they will do so through the US Mail

Received a message saying they were from the IRS and I was being sued.  I called them back and told them I was not giving them any information and they hung up on me.  Someone should arrest them for identity theft!!!