Re: reputation?
I had a very similar (used) car, but post the change to 40000 mile cambelt replacement interval.
After I'd had it 5 months, the cam belt went at 38000 miles, so I had it stretchered back to the (non-Vauxhall) dealer I'd bought it from under their after-sales warranty.
That dealer took great delight in having shipped to the local Vauxhall dealership for a new engine (refurb block with new giblets) under Vauxhall's own warranty.
TL;DR - I was in a rental car for a month (no loaners available) at Vauxhall's expense while they waited for parts from Germany.