Moderators literally never reply to my modmail?

My CQS score is highest. It's always highest. Every time I check it's highest.

A couple years ago, Reddit suddenly flagged my account as spam for no reason, even though I didn't do anything. Ever post on every sub was marked as spam and deleted by Reddit itself automatically.

It was extremely hard, and I had to find some good subs and have the moderators manually approve my posts before it let up a bit.

But it didn't let up everywhere...

The more strictly controlled subs that have stronger auto moderation on still get my posts auto deleted by Reddit.

Here's the issue though...

Mods never respond to my modmails anymore.

Ever.

Doesn't matter what I say, if I'm respectful, if I include a lot of detail, link to the post, no matter what I say or what I do they are ALL ignored.

Are my modmails being marked as spam too and mods aren't even seeing them? Are they seeing that Reddit thinks they're suspicious and thinking "ah this guy is probably a spammer I'll just not reply to this."?
Do they think I'm a bot?

There are a bunch of subs that I can't use, large and popular subs, and mods will not look at my modmail. I can't get my posts approved, I'm just ignored, so I can literally NEVER use those subs, EVER.

Is there nothing I can do about this?