When you damaged the port, I think it is likely that the pins inside of the USB port are now touching.
If the +5v pin is touching ground, it will cause a short which would explain the lack of power.
Potentially, the 5v pin is touching a data pin and may have damaged the USB controller (the chip that makes the ports work).
Something to try is to turn the TV off and unplug it, then shine a light in the port and see if the pins are touching each other.
If they are touching, find something small like a pair of needle-nosed pliers, screwdriver etc and try to pry them apart, carefully.
This is how I would do it but it could end in disaster. Not recommended
Once apart, try turning on the TV again and test the undamaged USB ports.
So this is a very silly DIY method but done carefully should work.
Another option would be to contact a company that can fix the TV for you.