Hiya,
Firstly The NUD complaints proccess is outlined in the policy booklet ( if you want to write in) and via my experiance this should not reach a "dead end"
It seems that you may have started the process anyway, what you need to do now is follow this up with the customer relations department.
To get this resolved a little quicker you could either email
helpdesk@norwich-union.co.uk - you can also find a "complaints form" on the main NU internet site
or call the switchboard 01603 622200 - they may be able to transfer you straight to a complaint handler ( in the Customer relation dept )
Advise you wish to make a complaint about a NUD Motor policy as you feel you were miss-sold,
all the above ways should get you through to a dedicated complaints handler who can investigate and listen to the calls ( usually a lot quicker then the general call centre staff)
Protected NCB is something that should be explained and offered at quote stage. However if you had a quote in writing first before taking out the insurance then it may not be relevant anyway as the onus would then be on you to read through the quote.
As for you point about losing your 8 years ncd, this unfortunatly is correct, the maximum NCB is 5 years however this is in line with most other direct insurers.
let me know via this thread how you get on.