I would like to upgrade from dal voordeel to dal vrij starting on the 1st january. What do I have to do? Thank you.
Beste antwoord door Richaaaard
Here you can read how to change your subscription from from dal voordeel to dal vrij.
Because Dal vrij is more expensive than dal voordeel you can change immediately.
If you don't have an ''mijn NS account just call the customer service (+31 30 751 51 55)