We apologize about your experience with our TowSmart Class 3 to Class 4 Receiver Adapter. We engineer and test our adapters to ensure safety and quality. Our goal is to provide you with the best customer service experience possible. We would like to gather more information about your concern. Please email your contact info to info@towsmart.com at your earliest convenience. Someone from our US based Customer Service team will immediately reach out to help resolve your issue.