Supposed warrant and legal case

I got the same email everyone else got. We all apparently have the same case number and warrant number as well. They changed my amount due by $18.00 but everything else is to a T including the date in 2015 they supposedly notified me on. They dont even have the correct address for me. It such a scam and I have been getting these more and more. I am not dumb enough to pay ANYONE over the phone let alone a debt that isnt even on my credit report. Any legit company would MAIL you something and when you trace them, would see its a legit company.