While rogers has/does send out sometimes these types of things..
They are usually a 'pass on' type of thing... that some other company, lets say SONY for example, was monitoring say a torrent, and recorded your IP address as downloading it.
They would pass on SONYs complaint letter.. as well as a notification that 'downloading illegal stuff goes against the rogers ToS, etc'
Now.. when they DO send these things out.. NORMALLY every time i have seen them, is via EMAIL, via the primary email associated with your account.
I dont THINK they would do it via TEXT.
What # is the text message from?
And did it have a LINK or anything it wanted you to follow?
I am THINKING maybe a phishing email?