Samsumg 70' Smart TV broken LCD twice in one year.

Bought a Samsung 70' smart T.V 2 years ago.. 1 year later the screen/ LCD stopped working and Samsung came out to replace the screen (t.v still in its warranty period) now exactly a year later the exact same problem the screen/ LCD has stopped working (now 1 month out of its Warranty) Samsung refuse to cover anything and say they only have a 6month Workmanship garrentee and no garrentee on the screen they replaced. There was clearly an issue with the t.v that it's now broken twice in a period of a year and Samsung refuse to do anything about it as its 1 month out of its warranty and they give no warranty on the screen that they have replaced, there is clearly an issue with the TV.