Horrible Experience

went to buy an XPS, consulted the online support to see if i can customize, the agent says no it cannot be customized. So, I order the laptop, two days later, the required configuration is available as Black friday sale.
I try to contact these guys to cancel order and let me buy a new one, I cannot since they cannot refund, and the they didn't charge me either. I cannot use the DFS account to pay back some money and use it again to get the 0%APR because the account cannot be activated without the account number that comes in a package after a week. 
(Guess what, I still haven't received my refund, it is about 3 weeks now.)

I ask my brother to generate another coupon so I can buy the laptop again after 2 weeks, Guess what, the coupon doesn't work and was apparently used, when in reality it never was never used. 

Now, I don't have my order, neither the money, nor the ability to buy the computer since there is no money in the DFS account.  What's the point in opening the stupid account if I won't be using it. And let's not even get to your customer service, After sales, sales and DFS are seperate and would never work together to solve a problem. 
they redirect my call and it goes to the usual IVRS. You guys are plain annoying and I'd recommend everyone to rather buy stuff from somewhere else.