@Luluc
As explained in our previous emails, a Pass is only fully refundable when Plus has been added to the original order at the moment of purchase. Unfortunately, your order didn't have Plus included and therefore wasn't fully refunded.
This is the reason why, as mentioned in our Refunds and exchanges policy website, you're only eligible for a refund of 85% of your Passes value, while 15% is charged as a cancellation fee, which has already been refunded to you on 13/12/2022 and which you should receive in 3 to 5 business days.
I regret to inform you, once again, that we cannot change our refund and exchange policy. Please note that this decision is final. When you purchased your Passes you agreed with our Booking Conditions https://www.interrail.eu/en/terms-conditions/booking-conditions and you did indeed agree to the Terms of purchase which are governed by Dutch law and that the District Court for Central Netherlands is the competent court. Should you wish to take this case to the "Fraud department", you are free to do so. Nevertheless, we have to stick to our policies and rules, as we consider the customer's responsibility to read the conditions before purchasing our products.
Thank you for understanding!