At Professor Color, we understand that dealing with printers can be a hassle, even on the best of days. That's why we go the extra mile to provide you with reliable cartridges that offer the same level of performance and quality as OEM products, but without the high price tag. While we have stringent quality control measures in place, there are instances where unforeseen issues can arise during shipping that are beyond our control. If you receive a toner cartridge that is not functioning properly, please don't hesitate to contact us through our support ticket system or by calling us at 1-(800) 211-2049. We will promptly replace your cartridge with express shipping to ensure minimal downtime. Our customer service team is available to assist you from Monday to Friday, 8 am to 4 pm PST. We value your business and are committed to providing you with the best possible service. Don't hesitate to reach out to us for assistance – we're here to help!