Dell Computer Lame Credit Background Checks

I tried through DELL to get credit for a new computer on credit. Dell said they ran a credit check and said I had no credit. Not true I have had a unsucured loan for 8 years with a loan co, I just got a home loan approvel and I am in my new home for 3 months. I have nothing on my credit other than these two loans and a credit score of 640. Dell says I have no credit, they better take a look at how they decide who has bad credit and good.Ill not buy a computer from dell if this is how they treat people. I called Dell and I could not get one real reasion why I was turned down. At least on the phone talking to dell I could hear them breath and thats about it.