Netgear Serial Number Already Registered

I purchased a used Netgear Nighthawk R7000 wi-fi router from some guy on CraigsList. The router works fine.
However, to use the Nighthawk App remote management features, I need to create a 'MyNetgear' account.
The problem is that requires registration of the device, including entering the serial number. When I do so, I get

This serial number is already registered to another customer. Please email NETGEAR support.

May 09, 2019  Netgear 'MyNetgear' Account: Serial Number Is Already Registered 11 posts Mad Man. Ars Centurion. However, at this point I am completely fed up with Netgear - see my post above. If your product does not have a serial number, it has been refurbished. The serial number is not required to register your product. Send email to customer.service@netgear.com with: the subject line 'Register a refurbished product' Product name; Your NETGEAR customer number or full contact information. I bought a refurbished Orbi and satellite from Amazon. When I try to register the serial numbers, it tells me (unsurprisingly) that they are already registered. Could you please de-register the following serial numbers and re-register them to my account that i'm posting from: Orbi: 4PM7715K042D8. Satellite: 4PN7725D063BA. NETGEAR Product Warranty Check. This page allows you to check the warranty status of your NETGEAR product. To use this facility, your product must already be registered. Enter Serial Number: Required Only 13, 12 and 15 digit serial number should be accepted. @ 1996-2019 NETGEAR.

Korg pa1x manual. Please be aware that the Company may not be able to respond to inquiries regarding owner’s manuals made public in this library from anyone other than customers who have purchased the products.3) This library does not provide owner’s manuals and product information for all of the products sold by the Company. The Company assumes that this material is utilized by the End User. Users are permitted to create one (1) copy for their personal non-commercial use.2) Materials such as owner’s manuals and related product information are intended for the use of customers who purchase and use the product (End User). Owner’s manuals or product information may not be available for all products indefinitely or at all, and may be permanently discontinued at the Company’s discretion.4) Contents of owner’s manuals and content as found on korg.com may differ.

Which I did, but have never received a response. And based on the reputation of Netgear's support, I don't expect one.

Netgear Register Your Product

Netgear Serial Number Already RegisteredHas anyone dealt with this issue before? And if so, how?

Netgear Router Serial Number Lookup

Used

Netgear Serial Number Already Registered Number

Thanks.