Dell 30-Day Price Guarantee at the mercy of a representative who thinks $200 isn't worth the effort?

From the Dell website: "Shop with confidence and don’t worry about missing out on the best price. If you see a lower price on Dell.com for a product you bought from Dell in the 30 days after your purchase, we will refund the difference."

I purchased the laptop from Dell with a sale price $500 off.  A couple days later the deal on the same laptop changed to $700 off.  I immediately contacted an agent through the live chat with the link which was passed along to someone who was supposed to take care of it. 

The response I was emailed was "it's only $200".  I have tried many many times to communicate with this representative but I've only received one further reply, and that was only after I called them out on the "it's only $200" remark.  I got a long reply this time that looked mostly copy and paste and did not answer my question.  I have received no further replies. 

What I've been able to extract from the confusing email is that the issue might be that I used a $50 Dell gift card as part of my payment?  Let's do the math here!  I'd happily not use the gift card in exchange for the $200 refunded price difference.  But the representative simply does not want to give me any further information or assistance. 

Of course the link is long since invalid so I can't try my luck at getting a more helpful person to talk to me (the laptop is only $300 off now).  Although I'm not sure why this would be an issue when it was Dell's own sale.

Support here has been very helpful in the past, maybe you can unravel the mystery of the 30-day price guarantee before my 30-days runs out?