How to block Universal Bypass users from accessing a redirect only page?

I currently run a site where you can see a discord link if you solve a puzzle.

On the last step I use something called "Linkvertise" to earn money from doing it such as AdFly or Bit.ly. The problem here is that when someone with uBlock Origin comes and bypasses the steps to get to the site directly, It completely ruins the whole thing.

I have seen sites that have a script that says that "You are using a Bypasser" and redirect back to the home page.

How do I do this and where do I put it in my code? (PHP)

Thanks!