It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately.If it's non-workdays, please kindly be patient and wait till Monday. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical, Lab & Dental Supplies\Trial Lens Sets". The seller is "wercham-32" and is located in this country: US. This item can be shipped to United States.