Sorry, but there is nothing we can do to assist you with this. We are just fellow Apple-product users. Since you purchased this, as you claim, from an Apple Authorized Reseller, you will need to work with them to get this resolved to your satisfaction.
Apple has a 14-day, from the purchase date, policy to return the product for either a full refund or a replacement. Since it is well past that time, your laptop still has the Apple one-year hardware warranty against manufacturing defects. This case appears to be a defect. I suggest that you give Apple the chance to resolve this for you. Otherwise, and depending on your country's repair laws, you may need to elevate this to your local authorities.