I received a voice mail from this number. The beginning was cut off the recording so all I got was "call 343-500-2024. This involved sensitive information that should not be ignored." with a repeat of the number.
As all government departments have toll-free numbers and clearly identify who they are looking for, it's a scam.
It's a scam! Will tell you their from the government and that you owe money on your income tax and you must call them right away or you they will send the police to your door.
Does anyone really fall for this line in a country like Canada!