refusal to repair the existing dents

I was previously insured with Alexandra Forbes which was subsequently taken up by Momentum. I had and accident on the 13 June 2021 and the claim was approved. I subsequently received an email that recalled the claim for pre-existing damages. I then contacted the insurance and I was told that I have to claim for individual damages, e.g: front right door, left front door etc and then I will have to pay excess for each and every part that needed repairs. This is non-sensical and it means that they are not willing to get my car fixed.

with Alexandra Forbes I knew that all this wouldn't be an issue, this is a very poor service I'm now receiving and I don't believe I will last with this kind of company.