I've Been Sent Three Separate Defective Laptops

In June I placed an order for the Dell XPS 15 9500 as I believed (and still do believe) it was the best windows device on the market for my needs. It took until the middle of July to arrive, however when I received it had an issue where the lid would not remain closed if the laptop was tilted at all (it would reopen about an inch). I reached out to customer service about this issue and they tried to have me send it out for repair with refurbished parts. I declined as I just bought the laptop and didn't want refurbished parts inside it, so I asked to return it. When I did so they changed their response and instead offered to exchange it. Eventually, they convinced me to exchange the device and I waited until August to receive the new laptop. The laptop I received no longer had an issue remaining closed, however, it did have a new (or rather old) issue: a wobbly trackpad. Dell had claimed to have had this issue fixed before I had even ordered the laptop in June, so I am not sure why I received one in August with this same issue. I contacted customer support and they convinced me once again to exchange it since they would have it for me within the same month (August). However, once I was off the phone they emailed me saying I wouldn't have the laptop until mid-September (a big difference and also after I began classes, which was the primary reason I bought the laptop). There wasn't much I could do so I accepted the facts and waited. I finally received the new exchange laptop yesterday (September 11th), however, this one not only has a wobbly trackpad on the left side, but it also has a lid that re-opens just like the first one I received. I tried to reach out for support both yesterday and today but both times I was transferred to the returns team only to be met by an automated message stating that they were not available at the time. At this point, I am unsure what to do and am honestly confused as to how its legal for a company do sell me a product and now follow through with the delivery of the product. I also bought 3 years of Premium Support and Accidental Damage Protection, which began to "protect" me in July when I first received my laptop, but now has been sitting idle for two months as I haven't got a chance to use my laptop, so essentially I lost two whole months of the service. I work in computer sales (I ordered this laptop from Dell as I can't buy the XPS where I work) and often recommend Dell over HP and Lenovo when customer ask about support as I had a really good experience in the past with them helping me, however, I now know to never do that again. And to add insult to injury I told two of my college friends to get XPS 15's as well and they did, but I guess I won't be doing that again. I am posting here as I am unsure what to do next as I still have a broken laptop and all I want at this point is to be done with Dell and have my money back. I am thinking that reaching out to a third party such as the Better Business Bureau or my credit card company will be the best way to handle this as it appears that Dell has no interest in actually acting "human" and helping me, as they would rather just go through the motions and continuously  me over. If anyone has any ideas on what I can do please let me know. Thank you.