Family Based Greencard

Well, me and my wife have known each other for almost year and a half. We met at work and started dating, then we decided to get married. We did so and I filled out all paperwork myself. I'm 22 and she is 18. The papers went through and soon I received my work-authorization. Not long time before we got married we got a car-loan and bought second car for us. When going to the interview we had joint bank account together, credit cards, car-loan, lease, bills, photos (not so many cuz we work a lot and we simply have no time to go take pics), photos with her sisters, not mother cuz she doesn't get alone with her mother well. At the interview the officer seemed like she wasn't really interested in looking through our stuff, she just looked at lease and car-loan and pics, then she asked my wife to leave the room. She asked me first, then she asked her. She was very friendly with us first, but then when she was asking us question the questions sometimes were so general and I honestly didn't remember what happened back then in details. I made some mistakes when answering the question cuz I was very nervous, but if the officer gave me the second chance, I would explain why I said so. But when she started asking my wife she was nice with her first, then she started pressuring her, saying than they knew it was fraud, and my wife was commiting several crimes for which she'd go to jail and I'd never get a green-card. The officer also said that nobody cares about illegals in this country, and I'll be one of them, when my wife will be sitting in jail. I was illegaly in the country for about 2 years, I think. She became very rude with my wife at the end and finally she said: I give you the last chance to confess that it's a fraud, and nothing'll happen to you. My wife said: if this is the last thing you wanna ask me, then I have nothing to tell you. Then the officer said: Then leave, quickly! That's how our interview went. We don't know what to do next. I was told that we could file a complaint.