answering machine message from revenue canada

receive 2 calls from revenu canada today, one hour distance bethween the calls.... sounds really untrue for revenu canada to make such a "general" statement; usually they will use correspondence with proper identification of both parties, receiver and sender....anyway they ask that i call back this number, i didn't, instead i came here to check more info.

I received a phone call stating that they are federal Revenue Canada Agency and asking me to call them back that I am in trouble with Revenue Canada