Even if the company is sketchy, shouldn't they be told very clearly exactly why they were banned, so they can appeal it if it's wrong? Imagine how ridiculous it would be if you could lose a court case without having been allowed to see the evidence.
I don't know anything about this company, but the other comments are giving the vibe that this company is similar in social status to a spam bot and Google's customer support is correct to cut them off with no explanation.