I'm at my wit's end. I've sent my brand new Samsun...

I'm at my wit's end. I've sent my brand new Samsung Galaxy Book in to be repaired twice because it refuses to charge and they keep giving it back unfixed. They say "Oh, we replaced this or did this," but the one thing they haven't done is tested it to see if it works. It doesn't. I've wasted hours with these people now. Hours. All to have a brand new machine that won't turn on or take a charge.