Dell wants me to sell on Ebay!

I called Customer Support after 5 hours on the phone with Technical Support who told me that I needed an upgrade to get a feature that I was told was on my current monitor upon purchase. Customer Support told me to sell my monitor on Ebay (true story) and call them up after to purchase a new one. I spoke to 4 different representatives including supervisors (one of which did not report to anyone) and they all read off of a paper telling me that there was no way to upgrade my monitor without my purchasing a completely new monitor. I explained that if I had purchased my original monitor under the impression that it worked for what I needed, then I should not be forced to purchase a completely new monitor. I stated I was willing to pay the difference, but I was still told that there was no way that I could have an upgrade. This will go beyond Dell.