Hi @biff, welcome to our community!

You only get a cancellation fee if you cancel within your contract or one month cancellation period. In your case there should be no fee as long as you cancel before the first of July
To cancel your subscription you can contact us by phone on 0800-0402

If you have any other questions don't hesitate to ask!

for anyone ending up on this page with a google search, KPN asked me to pay 90% of the remaining contract duration to cancel. remember this before signing up for a long term contract. looks like i will stick to KPN for a long while :) 

Oh apologies @biff , I completely misread your initial message. I thought you meant 17-06-2024 as the end date for your contract.

The cancellation Fee when you are still within your contract is equal to the subscription fee of the remaining period until the end of your contract