You can keep the ones you didn't sign for.
If they do show up then they would have no proof that they sold you the ones you didn't sign for and would have no ground to stand on.
It's a petty trick but if they are so disorganized then they probably have money to waste,chances are their drivers never gave them the signed invoices so they don't have it on their system that you received your purchase.
Chances are you might even get another TV landing on your doorstep.



