Update: yesterday I talked with KPN Network on the phone, they said everything looked correct, and directed me to KPN. Afterwards I talked with KPN, and they said it will be fixed on 3rd of March, which is my connection date.

Today (3rd of March), I got a message saying my connection is enabled and I can start using internet, but it’s still not working. I unplugged the fiber box for 2+ minutes and replugged, still the same.  Called KPN again, and they said a technician has to look at this, and he will arrive on Monday.

Is there anyone who knows / can check what my problem might be? Thanks in advance

Hi @Omer G! Welcome to the forum. In cases like this, or any case where speed is of importance, please call 0800-0402. It's our free number for customer service. 

I was going to say they will likely plan an engineer. But from the data in your profile I can see an engineer is already planned. 

Could you please let me know after that moment if everything works okay? 

Hi @Bram_

Yesterday a KPN technician came and checked everything, including the connection at central. He said everything seemed fine and it looks like a cable problem. So today a technician from KPN Network came and he just did something at central and finally fixed the problem. 

I still don’t know what the problem was, but at least I got my connection now :)

@Omer G good to hear that it's fixed now.  I`ll close the topic for you.