Its just awesome when the person you are supposed to face is inactive. Brilliant, really.
It's okay, you'll be good!
Yes you will be, since nobody will doubt that you were active enough to find a slot and your oponent has not logged for days. Rules say 3-0 which is nice for you since in BO5 if you don´t have a superior deck choice the chance to loose at least 1 match due to crap RNG is pretty good.
But I guess you would still have prefered to stand your ground like a good sport.