If you are unhappy with our service, you do not pay for it. Working with us will be an enjoyable and seamless experience. NTDAS is available via emails and phone during our business hours. We make sure to answer calls every time you call during these hours. We go above and beyond to ensure that orders are fulfilled on time and without incurring additional costs. In case it's inevitable, we will contact you immediately and get your approval first before proceeding.