That Rob Hayles at recarb just fixed two cracks in my carbon Dirty Disco cross frame.
Depending on the damage, carbon fibre is eminently repairable and I’d be getting a repair quote before splashing over £700 on a new triangle unless maybe there are warranty ramifications. I get that people are wary of repaired carbon, but a reputable specialist should do a perfectly good, as new, job if it’s repairable in the first place.
For perspective, a mate of mine broke a seat-stay on his carbon cross bike, repaired it himself with a DIT kit and raced the Three Peaks a week or so later with no issues. I’m not suggesting you DIY it obviously, but I wouldn’t assume that it’s not fixable without talking to a specialist.