My Volkswagen Caddy lost power after the emissions update - how do I proceed with Volkswagen?

Last night my Volkswagen Caddy lost power on the M5 (with 3 children in the back) and I had to be towed off. It had the emissions update a week ago and the RAC diagnosed an injector fault. Volkswagen are denying it is related and are telling me it will be two weeks before it can be looked at. I'm unsure how to proceed.
Part of the NOx emissions fix involved reprogramming the injectors to a different sequence: short, main, and then main again. If the injectors are worn they may not have responded well to this.
Answered by Honest John on

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