I have two 3rd-party batts for by D60, but OEMs for my D7K only because no one makes EN-EL15 aftermarkets AFAIK.
But I've never had a problem with the 3rd-party batts for the D60, and they're 3 years old.
I understand why you'd be upset, not getting what you paid for. But the off-brand batteries I used in my Canon actually work better (can get more shots per charge) than the authentic Canon's and they cost about half as much.
There are China knockoffs for the BIG nikon lenses, what should cost 7,000 + is advertised for 3500.....I am sure there are a lot more items we get taken on