Pro Video TV Repair

Pro Video misrepresented a TV they had for sale. Told me that it was a demo in their shop for 1 1/2 years old. I later learned the TV was 9 years old
On 10/18/19 I called Pro Video to diagnose a video issue I was having on my Samsung 65" Smart TV. They picked up my TV and advised it would cost $489 to fix. Or I could buy a 55" Samsung UHD Smart TV they had for $599+tax. I spoke with Lorraine S. and asked if it was a 4K. She said "No...it was better than a 4K with the latest technology". "Top of the line." I asked how old is the TV. She replied that it was a demo in their shop for 1 1/2 years. I asked to come by her shop to see the TV. She said no, as they were working out of their home. I agreed to buy their TV: Samsung 55" UHD Smart TV; Model number UN55D6050. Later that afternoon they delivered the TV and set it up in my home. I called Bill S.to ask if they accept VISA. He said "no". I paid $640.93 by check. Over that weekend I noticed there was no app for Amazon Prime. I tried to find a way to lead the app but failed. I called Bill on 10/21/19 who told me to go to Network and type in Amazon. There was no search button. On 10/22/19 I used Amazon's Firestick and that failed also. On 10/23/19 I called Samsung Tech Support and gave them the model number. The Tech told me this TV was manufactured in 2011 and that Amazon no longer supported this old model. I further found that other apps failed as their licenses had expired. I then called Lorraine to advise her to pick up this old TV and refund my purchase price. She called back and refused to refund my money and stated the invoice which I signed stated "NO REFUNDS". On 10/24/19 my wife sent Lorraine an email requesting a full refund and return of their TV. We have gotten no response. I went to their website and it states they take VISA. They are operating out of their home in Dupree Lakes Phase 2:

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I am attaching the purchase receipt. I wrote the model number on it.