Wifi is not working since this morning, box 12 is blinking

Hi @Atom, welcome to our forum!
It sounds like you're experiencing some kind of outage. Did you check on our website kpn.com/storing to see if there's any information about one on your adress?
That page also offers some steps you can take to resolve any other issues with your connection.

If those steps don't offer a solution and/or the quickest way to get into contact with us is by calling 0800-0402 (toll free and open 24x7)