I cant affored Shopify Bill What Can I do

What happens if I never pay Shopify? cuz they must actually be high tryna charge me 399 dollars when I cancelled before that and the subscription isn’t even active yet, I just wanna make sure that I don’t get sued and honestly I might just sue them cuz I’ve seen quite a few other cases on this. Like if I don’t pay ever it only says they’ll shut down my account, so if that’s it I’m fine with it.