Hi bunqers π
We've looked further into the reported issues and we're happy to tell you this has now been fixed! You can simply get your money back by inserting or tapping the card at the payment terminal at the merchant again π This is also known as Retourpinnen in The Netherlands.
If you're still experiencing any issues do let us know through the private support chat in the app under Profile > Menu > Get Private Support
Cheers! π