If you are a guest, you should contact customer support or do so from your booking page,
If you are an owner, contact your guest to do so either from their own reservation or via contacting customer support (it is always better if the guest does it)
Alternatively, you can request a cancelation from the guest's reservation page (be ready to waive all fees)
And contact partner support
Go to Inbox-Booking.com messages-Compose new message (topic-->reservations)
this booking number was for a stay on 5/18 for 1 night for 2 rooms, there is some type of payment error, that very well could be on the hotel's part, I needed
you are a guest or an owner?
If you are a guest, you should contact customer support or do so from your booking page,
If you are an owner, contact your guest to do so either from their own reservation or via contacting customer support (it is always better if the guest does it)
Alternatively, you can request a cancelation from the guest's reservation page (be ready to waive all fees)
And contact partner support
Go to Inbox-Booking.com messages-Compose new message (topic-->reservations)
Hope it helps