Xiaomi Enchen Blackstone 3D Electric Shaver Trims Skin Poorly

I purchased a Xiaomi Enchen Blackstone 3D razor. When I got it from the store, I watched a lot of videos and researched how to use it properly. I started shaving carefully, but even with extreme caution, it left dozens of cuts on my face without removing the hair. Despite the fact that my stubble was only three days old. This device not only failed to perform its function, but it also injured and inflamed my face. I wanted to return the product right away. I was given a tracking number and returned everything in its original condition, but my refund request was denied because the "product has been used." I only used the device once before realizing it was a dangerous and ineffective machine. I've been through a lot. I am requesting a refund and the return of my funds.