Won't do much good. Never return the calls. Callers are hard core Indian and Pakistan scammer /extortionists. They become extremely abusive when they find their scams are not working.
Glad to read all of these posts. I received the exact call today. Left the exact wording in a voicemail. Assumed it was a scam but searched anyhow. Really want to call back and harass them!!
IRS was filing a lawsuit against me and to call. Knew it was a scam so didn't call. Glad others posted their experience. I feel so bad for those who fall victim, especially the elderly. Makes me want to call them and tell them I am filing a lawsuit against them and someone is right outside to arrest them!