I don't care if it's a rebadged or not, if I ordered a Lexus, I expect to get a Lexus. Don't give me a fscking Toyota.
With that said, you should call these people up and tell them to send you a real NEC ND-1300A free of shipping charge, in addition to the amount you'll be spending to send the fake ass drive back. If they make any excuses, call your credit card company and bitch about it.
BTW, ND-1300A is a dual format writer = DVD+R/+RW and DVD-R/-RW.