AVG Tune Up Activation Key Invalid

Hi - I have tried following the instrutions as per your link but I am still getting a message that 'Activation Key is Invalid. Any thoughts?
Hi Chris.
We're here to help.
The code you received when bought from a reseller is not the original activation code.
It is unique code which you need to use for registering the product with us. Upon successful registration, you will receive the original activation code.
Click this link for instructions to register the product.
I have purchased a AVG PC Tune Up 2020 - 3PC - 3 Year from Amazon UK. When I try the activation code on the card supplied, it says it is invalid.

Hi Chris.
We're here to help.
The code you received when bought from a reseller is not the original activation code.
It is unique code which you need to use for registering the product with us. Upon successful registration, you will receive the original activation code.
Click this link for instructions to register the product.

I appreciate your efforts, Chris.

For further assistance, I have sent an email to share us the code purchased via Amazon.

Then, we will check and help you with registering the code and help you with activating.
Hi - I have tried following the instrutions as per your link but I am still getting a message that 'Activation Key is Invalid. Any thoughts?