Luther SAles Sent me a TV that was already broken Nationwide

I ordered a TV and laptop from Luther Sales on 10/31/17. It was delivered on 11/14/17. I had just moved to a new apartment so it took a while to get my cable hooked up and to get situated. I should have known it would be a problem when they tried to pass off a refurbished laptop for a new laptop but that issue was rectified. Back to the TV. It was received on 11/14/17 but I did not take it out of the box and hook it up until 12/10/17. That was when I got a TV stand for the computer and received the cable box. When it came out of the box, it looked fine. But when I plugged it up that is when I saw that the entire right side of the TV was cracked! I immediately contacted, Kerry, the sales rep that had been assisting me. This was on a Sunday and she responded to me that same day. She told me that she would look into it. She called me back on 12/13/17 and said that there was nothing that they could do because I should have let them know about the issue within 72 hours. I didn't see that anywhere in the paperwork and again I did not take it out of the box until 12/10/17. I advised Kerry that I would stop making payments on the TV and would continue to pay for the laptop because that is the only thing that I received that is working as it should. She advised that if I stop making payments on the TV then I would be turned over to collections. The TV came out of the box broken!! I should not have to pay for something that is not what was promised. I either want the TV replaced and I will continue to make payments or take this broken TV back and only require me to pay for the laptop.