Also got this message, I was with fido. I think only Fido costumers got this type of mesages, I was charged also in the past and I quit with fido because it seems they work together or maybe somebody from fido team members is doing this type of scams.
Congratulation! You've won 1000$! Text "DAM409842" (without quotes) to the following five-digit phone number "88188" to claim your prize.
Note: by the English usage, this is clearly an offshore scam, despite "local" phone #. In North America, we would say, "Congratulations!" and would word the funds, $1,000. Regardless, nobody just "wins" a thousand dollars by text. Nice try, boys.