Bests & Worsts Reviews from Amazon

I purchased these headphones for my 10 year old daughter to use with her school device. They were ordered on May 24, 2020 and she has used them weekly since. Today, 8/26/20, they stopped producing sound. They are useless now. I am so disappointed that they only lasted 3 months. I am hoping that there is a warranty on these but I can't seem to find one on Amazon. Prior to them not working, my daughter liked them quite a bit and would have given them 4 to 5 stars but can't now.