Hi @gkuriapp, I looked into this for you and I see that you haven't connected the Internet + TV subscription to your Mijn Odido account yet. Since the activation goes through the Mijn Odido account you need to have a working account to be able to access the page. You can login with your email address and all you have to do is click the button “Bestaand abonnement toevoegen” and follow the steps. After this your subscription is connected to the account and you'll be able to access the correct page! 

I did connect my Internet + TV subscription to my account. Now the activate button takes me to a page as given below.

But it does not seem to activate because I see again the button for activating

What happends when you activate it via our app on your phone @gkuriapp?