Sorry to hear that. What is the current firmware version you have on your TV?
I have a Samsung UN55F-6400 and the voice command menu keeps popping up in the middle of watching TV.
Its very annoying, since every time this happens, the volume decreases to zero, while it waits for you to make a voice command.
In looking at the manual, it looks like you can turn the voice command feature off, but when I go through the prompts to get to that part of the menu in set-up, there is no option to turn off voice command.