Second Exchange Order Canceled...What Is Going On?`

I ordered a Dell Inspiron 7000 series gaming laptop roughly a month ago that arrived with a damaged touch pad (moves around in its slot in the chassis and makes a clicking noise even when I don't press down on it). I called support and tried to set up and exchange for a replacement because I didn't want to have to send a brand new laptop in for warranty repair and be without a computer for two weeks. A support rep set up an exchange order, but several days later I get an email saying the order was canceled. I called to figure out why and was told the laptop was out of stock (even though I could still order one from the Dell sales site). I called again later to set up an exchange to give some time for the laptop to be back in stock in case that really was the situation. This time, I spoke to a sales representative who assured me the laptop was in stock and that I should talk to customer support to set up an exchange. I then spoke to support who set up another exchange order for me. Last night, I received yet another email stating my order was canceled, now six days from the initiation of the second exchange.

What is going on here? I've spent a cumulative 4-5 hours on the phone with Dell's support trying to set up and exchange for a brand new laptop that arrived with a malfunctioning part. Both times I have tried, the order was canceled for seemingly no good reason. It shouldn't be this difficult to get the product I ordered and not damaged in any way. Can I please have some help with this issue from someone who can figure this out? I don't think I can stomach another hour or two on the phone with support who can never give me straight answers to my questions.

Thank you,

Jonathan