The booking issued me twice on my invoices

Do not post account nor action requests,  Partner Support will never see these posts.

No action will be taken, contact Partner Support directly.

If invoice related use the dispute feature on reservation statements page or message Partner support 

Message or Call BdC PartnerSupport

1. In the extranet, go to the ‘Inbox’ tab.
2. Select ‘Booking.com messages’.
3. Right Pane - Click on ‘See Contact Options’. 
4. Choose Account
5. Now choose Other
6. Then at bottom , See all contact options, and click Message or Call
7. As there is no one number for all partners, the number for your nearest BdC Partner Support is then revealed.

Kind regards