Hello ​@Pedro Baliú ,

Ga morgen samen met jouw vrouw langs bij een KPN-winkel en dan kun je daar waarschijnlijk alsnog verlengen. Neem wel jullie ID-bewijzen mee. 

Google Translate: 

Go tomorrow with your wife to a KPN store and you can probably still renew there. Do take your IDs with you.

Hello ​@Pedro Baliú and welcome to the KPN Community! And also welcome to the KPN Family with your new subscriptions. 

You can transfer a second number to KPN by simply going to the mobile shop on our website and order a new mobile subscription with number retention at the same address. The name on the contract can be yours or your partner's, it doesn't matter.

When you are in the ordering process, you can choose that you already have KPN Internet at the same address and then the KPN Combi-benefits will automatically be activated as soon as the number is transferred to KPN.

Do you think this will work for you? 

Thanks for your detailed message Arjan.

I went to a kpn store and a sales assistant helped me out to add the second number.

Thanks though.

happy new year.