I have been very frustrated with Triumph UK and Triumph USA. However they did eventually listen and have promised to do something about my complaints. :}
Be sure to mail the letter as well as fax, address the letter to someone at Triumph asking them who to contact about your problem. Email people at Triumph UK, I started by emailing and mailing the letters to the people listed in "Torque" magazine and asked them to forward my email to the appropriate person. Keep your dealer informed.
Good luck