Before you get too carried away with the possibility your router's settings spontaneously changed on their own, consider the likelihood the diagnostic message regarding MAC address filtering is simply wrong. All you really know is the printer isn't communicating with your Mac.
MAC Address Filtering requires deliberately configuring that option in your router, and it's not a common practice for simple home networks intended for private use.
Determine, if you can, the exact Epson printer and Verizon router model designations as Jan Hedlund requested. Printing isn't supposed to be this difficult, besides, it worked before and it should work again.
Sometimes all it takes to fix things is to power-cycle the printer and / or router. Unplug them, let them rest a moment, plug them back in and power them on again. That action might allow your Mac to discover the printer again.
Or perhaps the printer is just broken. That happens too. Verizon isn't likely to be of much help with an Epson printer. (Actually, neither is Epson.)