Evri complaint: Damaged parcel

I stopped and returned a pair of hiking boots which I had posted by Evri. When the parcel was delivered, there was a large rip in the packaging (which was good quality plastic parcel packaging). There was only boot in the delivered parcel, despite me sending two. I raised this with Evri but the customer service worker Karrah did not look at any of the compelling evidence I provided. They rejected my claim based on their own opinion of the picture the Evri driver had provided. I have multiple images showing that it is impossible that two boots could fit in the parcel shown in the evri driver’s picture. The driver did not ring the doorbell upon delivery and folded the damaged corner underneath to take the picture. Evri have been anything but helpful in responding to my claim. The shoes cost £150, not to mention the delivery cost. Karrah refused to look at the further evidence I provided. The image below shows the delivered boot in the exact position the evri driver placed the parcel and took a photo. If more evidence is required, I would be more than happy to provide it. Thank you