Canceled “product no longer available”??

I purchase a Dell E310dw printer. I received a email stating order is processing. I received another order 2 days later stating “order is delayed in processing”. Then 2 days later I received a email stating “order was canceled”. 

I really couldn’t understand why so I emailed dell to find out why. Yes I used a promo code and got a really good deal on printer.  In the email from dell they said they couldn’t understand why it was canceled and to purchase it again. On the second purchase the promo code was not good. 

So I called dell on the automated system and they said “the reason that it was canceled was that the product was no longer available”. 

I know the product is available. It’s the DELL E310dw laser printer. 

I tried calling dell and the lady on the phone had such a heavy accent that I could not understand her. So I hung up. 

So what is the deal?