Unable to reactivate Cubase Elements 10.5 on my pc after reinstalling windows 10

I cant find my products in the registered products list in my account at your website. So unable to reactivate. I have the bill and activation code there in the bill but unable to reactivate. I have purchased the product via steinberg website.
I am totally devastated while trying to reactivate.

Please help me to reactivate my product that I have paid for.

Hi and welcome to the forum,

With the licences issues, get in contact with your local Steinberg distributor/support, please.