Hello @lewitje welcome to our forums!
As soon as you've received your TV subscription number and pin-code you can use these to watch TV on http://tv.kpn.com/ or our iTV app.
Am I correct in understanding you got a new home subscription?

Could you update the info in your profile? I can take a look at the status for you!

Hello @lewitje did you manage to get it working?

I havent heard from you so I'm assuming this was the solution!
If not, please let me know!