Again, you misunderstand.
Wymondham - London via Cambridge
SVR £46.80
Wymondham - London via Norwich
SVR £58.80
Also, even if you thought you should be comparing the ticket you hold to the fare from Norwich, you'd still be incorrect, as the
SVR from Norwich to London is £56.70
It's really difficult to follow what you are trying to do; there have been numerous misunderstandings in this thread.
It's also clear that you make many mistakes in understanding the validity of tickets, so if you want to do something unusual in future I would strongly recommend you don't do it unless you can obtain an itinerary from a booking site, and if you can obtain such an itinerary as part of your booking confirmation, you stick to it and show the evidence of a contract in the event of a dispute, rather than get into an argument that isn't going to go well.
It's evident that you are unpopular at Norwich station and I advise against doing anything that could escalate matters. I think there is a real risk that you will end up embroiled in a dispute that will have negative consequences for yourself, the staff, and for passenger rights. From your posts, it looks like you are looking to engineer a pointless dispute, and that is not something we are interested in encouraging.