Barnes & Noble Defective NOOK Color, B&N won't replace Internet

Less than 2 years ago, my husband purchased a Nook Color for me for my birthday. In the last few months, I have been having a lot of trouble with it. 

I took it into the store for help 3 times, and called their customer support 2 times. I also e-mailed them.

In all instances, the person dealing with me had me deregister and reregister my Nook, and then do a Factory Reset. 

I had purchased apps for the Nook. Some of them downloaded, some of them would not download. After the factory resets, at least 2 of the apps I had that did work prior to the reset would no longer work. Because I was past the warranty period, they only offered to let me purchased one at a reduced price. This would have been ok if I had caused the problem, but B&N determined that my Nook was defective. 

At first I only requested a refund for the apps that would no longer work, but they kept telling me they didn't fully understand the issue, and I needed to call customer support AGAIN. I finally ran out of patience, and said I wanted a new unit, since the defect was not caused by me. They have since stopped communicating with me.