I request you to talk to HP support.
They might have multiple options to help you with this.
1) Click on this link - www.hp.com/contacthp/
2) Click on "Continue as guest".
3) Enter the serial of your device.
4) Select the country from the drop-down.
5) Click on "Show Options".
Fill the web-form. A case number and phone number will now populate for you.
To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.
Cheers.