There's a stupid (hoping temporary) bug in Wizz Air website's configuration causing users, which are trying to unsubscribe from Wizz Air mail offers to see strange errors, they should not ever see.
First fuckup is, that you are not automatically unsubscribed after clicking proper link in each message, but instead have to manually enter email address, you want to unsubscribe. This is enforced by law in many countries, but it looks like Wizz Air does not take even a bit care about that matter.
Second fuckup is, that when you actually enter your email address and hit the Unsubscribe button, you can see as pretty picture as this:
Isn't that pretty, folks?
I can confirm the same. Quite a disgusting method to prevent people from unsubscribing.
check out my reply at the bottom
There is no temporary bug. I have tried to unsubscribe for the past three months and it still does not work as of dec, 10 2016
Try the link from google and not the one you access via the emails you receive. It worked for me. Also couldn't unsubscribe at first. https://wizzair.com/en-gb/newsletterunsubscribe#/
The general problem with Wizzair unsubscribe is NOT with link (working or not) that points to unsubscribe page, but with the fact that once you unsubscribe you're seeing an error instead of confirmation that your email address has been successfully unsubscribed. Check the screenshot in the post.