I'm sure they've refunded you
@[icon] but it definitely is in their ToS that they won't so it may be playing with fire a bit. In fact when I just did my annual call above 5 minutes ago they mentioned it to me explicitly when they were going over the free ST part of the deal. Something like "ST will auto-renew next year at full price and will be non-refundable after the first games are played". It actually kind of stuck out to me because I don't remember them mentioning it to me in the past, so maybe they're planning on tightening up on it going forward.
But yea, the first ST charge shows up long before kickoff of the first game anyway so that excuse is still usable even before the games start.