Grey Product at Sportmans Warehouse

I purchased two Pairs of shoes for my son, one was on 26.12.2020. Please note - He plays multiple sports and has different shoes for each sport. In Jan, the Salomon started to tear at the seams. I took the shoe back and they didn’t have his size, so I chose another pair. I noticed in February, the Adidas, which is the one purchased at the end of Dec, was also tearing. I took it back to Sportsman's Warehouse - and the buyer says that it’s not the quality of the product, so there’s nothing they can do about it. If my son is wearing the shoe every day, I would acknowledge that maybe he is hard on his shoes. But he wears the shoes once a week, sometimes once in two weeks. And on a side note - he wears his school shoes everyday, this year marks 2.5 years, he’s been wearing his school shoes, which is Green Cross. Do this is proof that he is not hard on his shoes. It seems to me Sportmans Warehouse is stocking grey product. If they look on my purchase history, they will notice I am always buying sports shoes and sports products but going forward, I will be changing my supplier.