Ask why they did not do a compression test when the new camchain was fitted, seems to me these guys are a waste of time, they should have had the head off and inspected the valves as soon as they found the chain had snapped, this always bends the valves it was just a matter of how many, the order for a new camchain and valves etc could then have been put in straight away and you would now be back on the road, seems to me your dealing with a bunch of amateurs, I would now give them a cutoff time for the repair before I demand a full refund on the bike, in writing to them a solicitor and to Triumph. As well as a courtesy bike until your is either fit or the refund is in your bank account. Just not good enough at all.