I just wanted to check that you have a bunq Travel Card, and not a Debit Mastercard? You can tell because the Debit Mastercard will say "Debit" on the front, and the Travel Card will say "Credit" on the front.
The bunq Travel Card is a true credit card, without the burden of debt. You can rent cars with it, without extra fees! 🎉
Also, with all bunq cards, if you don't receive the service you paid for, you can initiate a chargeback by contacting support. I believe that's the same for all Mastercard's worldwide, not limited to credit cards. 🙌
Hope that helps!