The OP's profile shows him in Kahleeforneeya.
The Kahleeforneeya Department of Consumer Affairs sez:
http://www.dca.ca.gov/publications/mail.shtml
"It is illegal for a business to try to sell you something by sending you merchandise that you have not ordered or consented to receive. A business cannot send you unordered merchandise unless the merchandise is:
a free sample which is clearly and conspicuously marked as such, or
mailed by a charitable organization that is soliciting contribution and is marked as a gift.
If a business sends you something in the mail that you did not order or consent to receive, and has done so with the intention of selling it or another product or service to you, you have no obligation to either return the unordered item or pay for it. It is illegal for a company that sends unordered merchandise to follow the mailing with a bill or a demand for payment. (
This rule does not apply where you have agreed with a business in advance to receive merchandise on a periodic basis, and it also does not apply to
a good faith error on the part of the business that sent the merchandise.)"
Send it back. They appear to have bent over backwards to correct their error.
I'd probably try for some form of compensation, perhaps a percentage off the TV you ordered, for your "trouble," but otherwise, you are legally obligated to return the product.