Can't get verified!!!

Very unhappy customer. Okay. I had high hopes for Dell. I went on their website and was WOWed by their laptops. They were fast and pretty. So I decided to order one. Since I did not have $1500 just lying around, I decided to apply for their Preferred Account. Worst decision yet! Fortunate, I was approved for a $2500 credit limit account. Then I really got excited about going with Dell. I ordered a $1300 laptop. Everything went well and I decided to place the order. After about a day, I received an email that said that my order was placed on hold. I was like huh? The email said that I would need to call the Dell Verification Department to get my account verified. I was like “Okay cool, it should only take a second”. So I called the verification department and was placed on a hold for like 30 mins. Then an agent answers the phone. The agent asked me to give my social security number and name; I did as I was told. Then the agent told me about some kind of identity theft protection stuff. After that, the agent asked me for “MY BEST CONTACT NUMBER”. Please noticed that he asked me for my best contact number. I gave the agent my currently working number. The agent then put me on hold for like 5 minutes. Then the agent asked me if I have another best number I can be contacted on. I told the agent that was the only number I have right now. The agent then said, to prevent identity theft and to protect Dell, he wasn’t able to verify my identity by the information that I gave him, etc…. I was like ? I asked him, why he wasn’t able to identify me and he said that the phone number that he has on file doesn’t match the number I gave him. He then said that he would need to call me to verify my identity. I told him that was the only number I have. He asked me do I have an old number. I gave him my old number and he said that was the one that he has on file. I told him that my old number is no longer in service. He said that since he can’t call my old number, he not able to verify my account. I asked him, what more information he needs in order to identify my identity. He said he’s not able to give out that information. I was like REALLY? Why did he ask me for my best contact number if he wasn't going to use it? I have tried multiple of times. I changed my phone number on all known accounts that I have and still no go with the verification department. I’m at lost ends. I don’t know what more I can do. Dell verification department needs some major improvements. Dell is losing customer because of them. Can someone please help me out? What more do I need to do to get verified? It has been about a week and still no luck.  I have an account with Dell and I can not use it!

Thanks.