Cleaning product and a small bag

The customer services of Adidas suggested me to buy a cleaning product because the front part of sneakers has become yellow. I bought the product from the link that they sent me but it didn't work at all. When i contacted again with Adidas customer services they told me that the cleaning product that they suggested me its to use before the white part becomes yellow. So they made me bought a product that is not going to help and they new it. I threw my money to the trash and im still waiting for them to respond for days now