I agree that you have a right to obtain the notices. Hopefully they provide them to you. But, either way, I'm pretty sure you won't be and shouldn't be getting your account back.
I think even if it turns out they did send you all three strikes at the same instant, they would still be completely in the right here due to the channel apparently being so dedicated to bad faith content pinching and infringement. It probably could've theoretically racked up dozens of strikes.
And it doesn't matter if you gave attribution. You only didn't monetize them because your account wasn't (yet) able to - you surely would have if you had the option. You said it yourself:
>With no way for me to really monetize them, I stopped running the scripts (which would be around the beginning of this month).
Giving attribution is better than not giving attribution, but it's still not close to sufficient. There are lots of channels that make tons of stolen profit off of creators (mostly TikToks and Twitch streams; fancy that...) through ads, sponsorship deals, affiliate links, etc. You very probably would've ended up like all those other exploitative, parasitic content-stealing channels after enough time if you could have and if YouTube didn't shut it down.
Some/many probably use bots like you tried to. They often include attribution. They never include consent from the creators they steal from, and they give the creators they steal from 0% of the profits they make from those creators' stolen content.
The creators often don't even know it's happening. "It's free promotion!" is not a good excuse; if you actually wanted to be a legitimate promoter, you would have done it legitimately, by contacting people and offering such services and working out a content uploading and revenue sharing agreement with each individual ahead of time.