Thank you for your feedback. We appreciate that you took the time to give us suggestions on ways we can improve our service. Customer service is very important to us. We sincerely apologize for the discrepancy in the invoice because our record indicates the charges were for 8 lug nuts and we replaced 16. However, if you see otherwise, please bring in your receipt so that we can make the necessary adjustment. We apologize it took longer than expected, which is why we gave you a 95 dollar discount to your bill. Hopefully you will reconsider your statement and take advantage of the free future services we offered such as the free oil change. Thank you and have a great day.