Their camera doesn't, as you say, show you passing any No Right Turn sign, and as this is a signal-controlled junction, such a sign will, (or should be), on the actual signalhead. Latest GSV is October 2024, with the single signalhead covered-up. We need to see what that signal head now has on it. I suspect it has a NRT sign below the green phase.
HOwever, if you want to get things rolling, submit reps stating that their photos do not show you passing a No Right Turn sign, therefore the PCN is void and must be cancelled. Of course they will reject this, but may reveal something in their reply we can use against them.
