Hmm, how annoying for you.
I’d hope that either the dealer or Triumph will gift you the extra 2 year warranty as a good will gesture or a super duper p’ex against another Triumph.
I don’t see any other way out of this for you.
Those that seem to think you should do away with the QS/blipper as it’s not a requirement are not being rational. I’ve a bike with this feature and although not vital being without would take away some of the fun of riding. You’ve bought and paid for a feature on the bike that just doesn’t work without being replaced every 1,000 mile.
AF DCT, great bike neighbour and mate have one.