Unfortunately you don't provide enough meaningful information to be able to help you.
Taking a guess based on the amount you mention: You probably ordered a bunq metal card and this is the amount you prepaid for your bunq subscription (12 or 24 months) to be able to order the metal card:
https://together.bunq.com/d/23424-metal-card-how-does-it-work-and-how-can-i-order
Not quite sure why you would expect the money you paid for the subscription to show up in your account balance though...
If that's not it, you need to provide more information and/or contact bunq support.