When I smashed my windscreen I recall I didnt even bother ringing the insurer I just rang whoever did the work (dont recall but it will have been 'glass or 'windscreens) and they confirmed that they would do the work and they dealt with my insurer iirc.Frustrating day. The insurer's choice (Autoglass) said I would need to travel to their service centre which is miles away so I rang a few other companies hoping that I could find one that would work from my home (and I'd just suck up the cost provided it was reasonable).
The only company I found who said they'd do it was Auto Windscreens who wanted £218 so I booked it only for them to email me 10 mins later and tell me they'd made a mistake and the actual cost was £580 "due to the vehicle having a driving aid and part only being available from Volkswagen". Presumably the lane assist?
So I cancelled that and still need to figure something out