No activation code!What should I do? How long will Nexway answer email?

I bought Cubase10.5 pro online, but receive nothing.
I guess I wrote wrong Email address at the final step.
I submit a request via, still no answer. How long will it take?
I dailed phone number, nobody answered.

And there is nowhere I can find my billing address and payment information in the Steinberg account.

What should I do!??
Please help!
Thank you!