most insurers at the present time, if their policyholder is wrong, will arrange to meet with you either in person or by phone, at your choice, to try to settle the matter with you. They should not put you under any pressure and when you are finished with them, ask for a day or two to talk it over with a friend.
reasonable car rental should be paid, all other costs you mention wil lalso be paid, but up to a reason. you cannot claim for example €1000 per day storage.
Good luck