I don't see why you need to give up. We usually figure out the cause of problems like this after a few exchanges.

If the Sony remotes don't operate the SOTECH then it's unlikely that the database entries for Sony or CCF files for Sony would work.

But that leaves unexplained why the two learned signals you posted were standard Sony DVD commands.

Can you try again and post the Pronto Hex for some basic commands (such as Play) for the SOTECH.