I'm not sure if suing is a reasonable way to go - suing would work if there's a legal right to continued service or "answers" but IMHO there is not, technically for such B2B deals Stripe has the legal right to say "you haven't broken any explicit restriction or terms of service, but we simply decided to terminate the contract because we didn't like your business" or "we threw a bunch of dice and arbitrarily chose to".
