£1200 is the final offer from Kenisis.....full stop.
So, I guess it's now down to me to decide if I want to take a punt and get another frame from Kenisis with five years warranty or spend double and go with a Reilly that has a lifetime warranty.
Good money after bad IMO. In your position I'd sack them off, buy an alternative with better warranty / after sales and ensure the entire world knows of your experiences..