Many times over the years I've had to return items on eBay for one reason or another. The process is NOT straight forward. Unfortunately, the sellers cannot issue you a simple link to return the item, you must use eBay's riggamarooed return process.
The normal way to play the Jews Harp (Juice Harp) is to put it between your teeth. Because the modern Jews Harp is made of metal, it may pose a hazard to your teeth. Here's an alternative way to play, using your lips!