Used Google Ads Wizard, got account suspended. Google won't tell me why

So nearly two years ago, I signed up to google ads to promote my website. I used their 'wizard' / onboarding process, and clicked next, next, put in some sample words and hit go. Next thing, my account is suspended for 'circumventing systems'. This confused me, as everything I'd done was through their own system. I immediately contacted, and was told "we can't tell you why". Again, I was confused - I wanted to fix whatever the issue was. I asked them to recheck. "We've reviewed your case and can confirm you violated the policies. We can't tell you how though.". Annoyed, and obviously stuck, I gave up. Every few months since then, I get emails asking me to use free google ads credit. Excited (at first), I login to use it, only to see the reminder that my account is still suspended/cancelled depending on where you look. I've twice tried to contact them again, and again get stonewalled with "you've definitely violated something which we can't tell you about.". Is there anyway back from here? Anyone else been in this (clueless) situation and have a way to resolve it?