Then there is something completely wrong with either the remote or the TV.
They came together, and they are defective as new, and this is not a configuration difficulty. I think it is a fault inherent in the equipment.
So the right thing to do is, to pack up the remote at least, if not the TV too, and return them to the store you bought them from, citing the problem inherent in them, and requiring an exchange for another TV of equal or equivalent value in their place. If you purchased it recently enough and return it soon enough, this will still be a good way of settling the problem, by a return-and-exchange deal.
If it is late enough, though, the return-exchange period will be over. (It is meant to be just long enough for you to assess whether your purchase actually works. In this case, it clearly doesn't.)
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