Hi,
I recently got an invoice for 56 euros and then cancelled ns flex and got an invoice for - 3 euros. I got an email to pay manually and i paid 56 euros. Now it says that in the ns app that i didnt pay fully, since i need to transfer - 3 euros. I paid 56 instead of 52. I called the help line and they said my chipkaart will get blocked? Anyone has ever dealt with sth similar? What should i do?