IRS phone scam

I received a phone message stateing that my attorney or myself needed to call immediately on a time sensitive message.  I did and was directed to Special Superintedent Dexter Cruz from the IRS special investigations unit.  He state that my past 7 years of tax returns had been examined and found that I had committed fraud and there was an arrest warrant being issued within the hour and I would be taken in to custody.  They only thing that I was able to do was to pay cash by using Re-Load It cards to pay the defificetcy.  While I knew I didn't owe taxes, I also did not want to go to jail.  So I paid the $12860.00 and am now trying to get as much of the message out as possible.  If this happens to anyone else do everything you can and tell everyone you can.  I know it's embaracing but it is vital that everyone know about this scam.