In case of a complaint please contact customer service of the (online) retailer where the earplugs were purchased. They will handle complaints and refunds acccording to their customer service policy. If you purchased Shush hearing protection here at the our own website, please e-mail to: support@shush-earplugs.com. Please provide us with a clear photo and description of the complaint or defect along with an order number. You can expect a fast response from us in case of any complaints or warranty claims.