Sometimes sellers make an error and may list items with postage when it is simply not practical to post them - we all make mistakes, don't we?
Hopefully, they have refunded you.
You can leave them feedback to say you are disappointed. Personally, I would just find another TV unit.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)