I don’t see why everyone is on your case. I’d be outraged too.
However:
The proctor was pretty strict but you should’ve explained to him and acted like a dumbass while simultaneously saying “sorry sir, i didn’t know. won’t happen again,” then he would have sympathy for you. either way, TCB won’t do anything and the bottom line is there nothing that can be done. The test was cancelled and you can begin to study your butt off for Jan you know.