Hair Loss After Using Urban Care Purple Shampoo

I recently bought the Urban Purple Shampoo 2-pack from Watsons, but it didn't give me the results I was hoping for. Actually, I started losing more hair than usual after using it for a while, even though I don't normally have any problems with my hair. My hair only stopped falling out when I stopped using the product. Also, the shampoo didn't fix the problem of hair color change or any other issues. I've been using Urban products for a while now, and I gotta say, I'm really let down by this purple shampoo. So, I want to ask if I can return or exchange this product for something similar that won't make my hair fall out.