Cascadia trail running shoe design fault

I purchased a pair of Brooks Cascadia18 Trail running shoes at Sportsman's Warehouse - prior to walking the Camino del Norte, I specifically purchased size 8 shoe ( I usually wear size 6.5 or ), to ensure that I had plenty of toe space both in length and width. They fit very well and I loved them - however, there is a weakness on the sides of the shoe, where the design is faulty. The plastic designer wrap does not cover the whole side. In less than 2 weeks (200km including a few training hikes prior) and the sides started tearing. I had no choice but to continue walking in them for the rest of the Camino. I took photos of the shoes on day 13 and noticed that other Pilgrims did not have the same issues I had with their make of shoes. The Brooksrunning-SA website states that there is a 2 year warranty on shoes, this put my mind at ease. However, when I reported the issue to the Brooks manager, Clive Chowles, he said that they offer 6 month warranty on shoes with design fault. I advised him that I had read on the website that the warranty was for 2 years. In my opinion, this is a design fault, a weakness where there is no plastic/silicon wrap... both my husband's pairs of Brooks have torn in the same place. My shoes had not been washed(not possible while hiking the Camino), this, I understand can cause weaknesses, especially if washed with strong detergents. Mr Chowles offered me a 25% discount on the next pair purchased, but I have not accepted this offer, as he is not accepting that there is a design fault. I wish for the staff at Sportsmans Warehouse and other outlets to make sure that clients looking to purchase Brooks shoes should be aware of this weakness in the design. R3000 is an investment and surely trail running shoes should last longer than 2 - 3 weeks before getting tears. I do not wish to buy Brooks again- with or without a 25% discount, as I need to invest in shoes and a company that will look after me and hear me. Clive advised that trail running shoes have a life cycle of between 600 and 800km.. I wish this had been the case but unfortunately NOT. Sportsman's Warehouse Ballito staff were very helpful and supportive in this regard, however, they are still marketing and selling these trail running shoes.