Google presumably hasn't signed a long-term contract with you to provide any services or continue a business relationship.
Is "We don't want to do business with you any more because our algorithm isn't smart enough to differentiate what you're doing for fraud" actionable?
Well, that really depends on the case and jurisdiction, I can't answer that for you. Really, the key part is to force Google to actually provide reasoning for their actions, as they eventually did in the case I edited in links for.
I get the desire to impose costs on Google for their bad actions, but this doesn't seem like a very productive plan.
It's not as simple as "Google can cut you off no questions asked whenever they feel like it"
Are you sure about that? Often such terms are built into the user agreements.
I suppose there are a couple of issues that haven't been tested in court.
But besides that, anything you paid and wasn't rendered as services needs to be refunded. It doesn't look like they refund it most times, no?
For non-negligible damages, heading immediately to small claims court (given you live in a sensible jurisdiction) seems to be the easiest thing in that case. Even if Google's ultimately in the right, they typically can't just ignore that entirely.
From a decade ago:
https://www.huffpost.com/entry/why-i-sued-google-and-won_b_1...
https://www.huffpost.com/entry/why-google-bothered-to-ap_b_2...