Disguisted long standing customer - very unhappy with Hyperli service

I am a very unhappy Hyperli customer right now. I bought a Genie Hourglass Waist Training Belt Size: L/XL from them recently. I wore it twice and the belt was so painful and scratchy by the time I was done training on both occasions, it had damaged my back where I had wounds and visible cuts on my back. I sent them a complaint asking for my refund as I cant use the product anymore and even sent them a pic of what it did to my back. I didn't get any response. I followed up with them again only to get a service consultant telling me that she's sorry to hear im not happy as if I just don't like the product and not acknowledging the fact that the product is dangerous and advising me they unable to assist with a return and refund due to the nature of this product and that had I notified them on the same day I received the product they would have been willing to refund me as it would have been unused and in the original packaging.

Now being unhappy with the waist trainer was an understatement, this product damaged my back and they have the audacity to tell me they unable to assist with a return and refund, what am I supposed to do with it? Hand it over to someone else only for them to be wounded too? Throw it away and my hard earned money is gone? This is unacceptable.

How can I have notified them on the same day if this is meant to be only used when im training? I don’t train everyday so I used this as and when I needed to use it

There is nothing exception about this.

I want my money back from the and to fetch their hazard product.

They certainly have lost me as a customer as of today.

I packed it back in its pack and how else would I have known if it’ll damage me if I didn’t use it? It is a stupid ask to say if it was unused they would accept it.

I WANT MY MONEY BACK PLEASE.