eBay

My item is missing, haven’t received my waist trainer ones again and the seller isn’t responding

My arrive is missing, haven’t received my waist trainer ones again and the seller isn’t responding

Hello, I need help on getting a refund on a item that I did not receive, the seller hasn’t respond back to me and eBay told me to tell y’all if the seller didn’t say anything by the 28 to message yall