Sometimes you have to hack their support script to get a replacement or a refund. After the first support call if you don't get what you want and it happened again, Call back to open a new support ticket. Pretend to walk through their steps but not do anything, and when they asked what was on the screen I would say it's blank and not turning on.
or - and this is gunna sound crazy - I don't compromise my ethics and lie to a company to get "service". Instead, i'll loudly tell everyone that Samsung is a crappy company that doesn't care about their customers.
i'm the "SME" / tech support everyone asks before they buy expensive things, so if someone's looking for a new fridge or whatever "don't buy samsung" has cost samsung more money than i could cost them by lying to them, even if, by all rights, they ought make me whole.
They had their chance to deal with my legitimate grievances, now they can deal with me badmouthing them.