Good morning Shreya and welcome to the NS Community!

I'm sorry to read you missed a check out. You can request a compensation for this via your Mijn NS account or www.uitcheckgemist.nl, provided you are travelling with balance on your OV-chipcard.

If you are currently using an NS Flex product, you can contact our Customer Service. They can ben reached by phone (030-7515155), Social Media (Facebook or Twitter) or Chat (button ‘Chat with NS’)