cannot use damaged tv coaxial

JustMe615

Prominent
Apr 20, 2017
1
0
510
cable company sent 2 boxes. LR and BR (not set up yet)
could not get many channels or HBO and was told by comcast rep that it was the wrong box for the tv. coaxial cable will not work on my damaged tv, so i need to go through hdmi but the box has no other options than colored L and R ports. Any idea what to do?