Wow, August 9th was a busy day for these scammers because I also got two calls that day from this number. I was left two of the exact same recorded messages, word-for-word that Heidi reported. BLOCKED.
Automated message scam. "In regards to a legal case file against your name, this is Officer Smith from CRA the tax department of Canada. This call is officially a final notice before the matter goes to Federal claims court house of you get arrested. Please call us immediately on our online division number that is 613-800-7486. Please make sure you call us back immediately..."
They called me today and spoke to Paul who didn't sound like Paul - then he tells me I owe money from 2010/2011 tax totalling 7900. Last time I called them I was told 3500. As soon as I said that, the number hung up. Be careful