I think when you buy something you so have checked and if after checking still buy and now you have a problem you should call the person who sold you. Not post in a forum. Maybe he will be willing to exchange or something. Sometimes just don't understand you ppl here is to make friends not enemies. I have seen the Dupla b4 and after he showed me I didn't buy from him because I think its faulty after he showed me and I could have got something cheaper and low and behold I did. So if you didnt felt like buying dont buy just walk out and the word cheated is a very strong word to use. Honestly I believe you should be man enough to call him instead of post here.
Question is spolit why you still buy? felt obligated?