My wife and I got banned by Chase, also. They don't tell you why, but I accidentally submitted two credit card applications (one for myself and one for my wife

My wife and I got banned by Chase, also. They don't tell you why, but I accidentally submitted two credit card applications (one for myself and one for my wife) with identical northwest airlines frequent flier miles numbers. I think this must have flagged something because one day I noticed all of my Chase cards and accounts stopped working and I got a letter in the mail a few days later. There was no phone number, only an address to mail a letter for further inquiries. I mailed a letter explaining that I thought they made a mistake. Someone called me back and told me it wasn't a mistake and they wouldn't give me any more information. I suppose somehow, legally, this became the best course of action for Chase bank - to cut the customer off immediately and give them zero information about it. But it really doesn't feel right and made me never want to do business with Chase again.