Best buy Samsung Plasma T.V screen just started cracking. bellevue, Washington

I first bought my Samsung Plasma Flatscreen from Bestbuy on 02/11/11. When it was delivered I had no issues or problems. A little over a month later a crack appeared on the lower left corner of the screen. Which I found to be incredibly odd considering I had been gone all weekend and no one had been at my house at all .
 
I called best buy and did all the nessecary steps to try and have this fixed and or resolved. I was given the round around and passed from person to person only to be told that I was mistaken and it had to have been physical damage. I insisted there is no way it could have been physically damaged and it had to be something internal.

I was then told that they would have a service person come to look at it , but if they "deemed" it physical damage I would be charged for the visit. I was incredibly upset and asked what I should do because I am a single mother and student and could not possibly afford to pay anything more. They advised me to not have them come because it sounded like physical damage even though I assured them it was not possible.
 
After all of that I finally just gave up because I was getting nowhere and the crack really hadn't affected the picture at all. now about 6 months later I came home and turned on my T.V to hear a loud popping sound and the red light flicker and the TV not work at all.

Upon closer inspection I saw that there are 2 more huge cracks on the screen of my t.v. after which I did the steps to get help to yet again no avail. I am incredibly upset and pissed off that this company is allowed to do this to people.

I have researched this problem through and through and amazingly there are hundreds of other people in my EXACT situation . I couldn't believe it . This tells me that I am not alone and they are completely ripping people off on not replacing this defective TV. Please help me . I do not know where else to go . Thanks