Cashback problem with HP M15a Printer

[LoneRanger30]

Hello,

I purchased a HP printer from Ebuyer (online), after I received it I applied for the £20 cashback on the HP website. I uploaded the 'Item despatched' page screenshot from Ebuyer and sent it.

This page incuded the date, model, price, order number and my contact details. I've received a reply from HP saying that I have sent a 'non-relating document instead of the invoice'. 

What is the correct document that I need to send instead?

Thanks in advance.

[rick-s]

@LoneRanger30

I have brought your issue to the attention of an appropriate team within HP. They will likely request information from you in order to look up your case details or product serial number. Please look for a private message from an identified HP contact. Additionally, keep in mind not to publicly post personal information such as serial numbers and case details.

If you are unfamiliar with how the Community's private message capability works, you can learn about that here.
Thank you for visiting the HP Support Community.

[MarcusSoMe]

Hello again, 
 
Thank you for your reply. We would like to review support options or route your case to your local support team for your region but in order to do so, we need the previously requested information. Can you please reply with the previously requested information? 
 
Thanks, 
-MarcusSoMe