I am at a loss at this point

I am at a loss at this point.. To preface, I bought an Oura ring for myself with my Christmas money. I am a chronic illness girly, and thought the stats would help significantly in keeping track with my health and flare ups. I bought the ring on 12/31, just keep this in mind. On January 26th, my Oura ring BURNED me. I mean it woke me up out of a dead sleep, blistered, the whole nine. I reached out to Oura, figuring it was a manufacturer issue. The second they asked for an order number, I advised them that I purchased it at Target, they said reach out to Target. By the time I got the runaround from Oura (chat and email options only, no phone number) it was late. I reached out via chat to Target letting them know all of the injury details and inquiring about a replacement or refund, they said someone would reach out to me. A few days went by, no one had reached out, so I called them. This was on 01/29, once again please keep this in mind. The representative said to wait, they would reach out, give them 5-7 business days. So this brings us to today 02/03. No one had reached out STILL, so I called again. I said no one reached out, I would really like to reach a solution blah blah blah. They said “Oh, we can’t refund you or anything… your return window ended on 01/30… you should reach out to Oura”. Absolutely baffled. I frown upon yelling at poor customer service agents, I know it’s not their faults, but I was like “I was under the impression that there was a different procedure for merchandise that causes injury, no one told me to return it in the store, they told me to wait until someone reached out…” They are basically saying there is absolutely nothing that they can do for me. They can just make note of the injury for their own records but that’s all. I am baffled. I have gotten the runaround just to end up out almost $400.. I know it seems stupid but this was a big purchase for me.. I am a single mom, I thought this would be something I do for myself since I don’t get to “treat myself” often. I know this was a lot of complaining, but I am really at a loss that there is nothing that can be done about this?