i find your comments difficult to believe... you must be leaving out important details....most retail stores have a 14 - 30 day return / exchange policy.. and by your own words you just got it a week ago... if you bought it direct from dlink they have a 30 day refund / return / exchange policy see below i just copied and pasted it direct from their site:
https://www.dlinkshop.com/service_info.asp?section=6#1
What is your refund policy?
D-Link is happy to accept returns of purchased items within 30 days of the date of shipment.
D-Link does not issue credit for costs incurred in shipping a returned item
D-Link must receive the returned item within 10 days after an RMA number has been issued. An assigned RMA number is valid for 10 days only and will expire on the 11th day after the date of issuance, at which time any returned products will be refused.
Items should be returned in as-new condition, disassembled, in original packaging with the packing slip, all warranty cards, UPC tags, manuals and accessories in the original shipping carton. Failure to return all original merchandise with accompanying accessories and materials will result in the product being returned without credit and at the expense of the customer.