If you use the top banner you should be fine to get to the landing page.
I'm curious why you didn't know the casino while you're promoting them?
The problem isn't use the top banner or which link to avoid get redirect to other domain, but it's because of restrictions on internet provider. So, the
https://3.ru.zigzagsport6.com is safe and not phishing.
I've contacted the zigzagsport support and they explain it.

great! thanks for clearing that up. I got cautious since I've seen a lot of websites that looked like the official site or sometimes they looked identical to the official website of some company but turns out to be a phishing site.