Dynamic Product Page

Hello, I have created a product page using the store and I wanted to add some extra information at the bottom of the products manually with some customizations but when I do that it’s reflecting on other products also and I am not able to get rid of this issue since last 10 days I am stuck in this situation can anyone guide me for this issue tried calling Wix support they also don’t have a solution for this I am not even able to move the product title not able to customize as I want because of this issue. Please Help.