Action to take??
You have been told what you need to do and that is to undertake training to overcome the over convergence of your eyes. You should start ASAP.
You missed the appeal date and failed to take good advice!
It probably is too late to appeal if your diagnosis is correct - you were told.
Have you got a second opinion and a training regime yet?
If you want a class 1 you will have to work for it.
You may not be able to appeal but you should be able to be retested after succesful training or has this been ruled out.
You already know all this so why post here? Perhaps a medic may reply...