Win 10 activation is expiring - volume license

I just started getting the popup message that "win 10 activation is expiring"
reading some threads here I figured out that it is expiring on 3/13/18 and it is a volume license

I bought this computer from a private seller on ebay. I'm pretty sure it was upgraded from Win-7 because
under the battery I found a COA , it says "Win7 Pro OA"
and it has a different product key than shown by ShowKeyPlus


I ran ShowkeyPlus, here is what it said.

ShowKeyPlus - Windows Product Key Information
Product Name: Windows 10 Pro
Version: 16299.248 (64-bit OS)
Product ID: 00331-10000-00001-AA753
Installed Key: W269N-*****-*****-4J6C9-T83GX
OEM Key: Windows 7 OEM marker present in firmware


ShowKeyPlus - Windows Product Key Information
Original Key: W269N-*****-*****-4J6C9-T83GX
Original Edition: in 10 RTM Professional
Volume: GVLK EULA Type: Volume

So now I'm not sure what to do.
when I go to the control panel is says computer is activated.
what can I do to get it re-activated and stop the message?

If its volume license it doesn't activate via Microsoft it needs a local enterprise kms server. So basically you have a pirated copy as it only for enterprise customers. I would contact the seller or ebay and get a refund for a new o/s

If I get a non-volume product key - can i just activate with that or do I have to re-install Windows.?

Chances are it wont activate as it will be the wrong type of key but its the first thing to try if it fails the you would have to do a clean install. If you bought it in good faith then seller should pay for a genuine copy ebay , paypal or credit card would force that. It needs to be done as he may be doing this to other people and and as win10 pro cost £220 he could be making thosands with pirate software Ebay should take immediate action

Try changing the product key to the Windows 10 Pro generic product key:
VK7JG-NPHTM-C97JM-9MPGT-3V66T

Then if Windows 10 Pro does not activate with a digital license, see if you can change the product key again to the one shown on the Windows 7 COA sticker.

But, yes, as stated, the seller sold you an illegitimate version of Windows 10 with the computer.

For the OA part on the COA sticker, it means OEM Activated. Earlier stickers may have had OEMAct.

sounds like the best solution would be to download Win 7 pro from Dell and reinstall that since that is what the key under the battery is for.
I'm assuming if I try the method suggested above (try the genic win 10 key) if it doesn't work I will be locked out of my computer.