Replacement of Adidas Tracksuits Under Warranty: How Much?

I paid 640.00 tl for two Adidas tracksuits, but after wearing them for about 4-5 months, I noticed color fading on both. I chose to send them in for warranty service. Adidas acknowledged the defects and offered replacements after inspecting the products. However, the same items were not available in stores. They informed me that I would have to pay the difference in price for new ones, which was 1400.00 tl. While it is commendable that Adidas acknowledged the flaws and provided replacements, it is disappointing that they do not provide additional assistance when the new products are more expensive. If they admit a product is defective, I believe they should assist customers in receiving a comparable item at no additional cost. I'm looking forward to hearing back from the company on this.