Activation Code not valid

Read and followed all instructions. Reinstalled Windows as a last ditch effort. Fresh install, followed all instructions once again, and once again I get

“The activation code has been used already. An activation code can be used only once to download or upgrade a license. Please contact your software vendor to get a valid activation code.”

What is going on? Why is my activation code NOT VALID? I’ve never spent so much time on a software product issue in my life.

You need to follow the “re”-activation part in mySteinberg.