After my 2nd response, an automatic "Premium Service" offer will be made. Please disregard it, as it will not help in this case.
Please also accept my apologies for taking some time in answering. It seems this issue is not "simple", but it is "easy enough". The ink waste pads are real items in the printer, but they may or may not actually be full, so it becomes a bit tricky. If they are not actually full, you might be able to reset the counter to "0" and printing functionality is restored. If they are actually full, then it is very important to replace them.
So, how do you know for sure if they are actually full?
The "official" Epson answer would be, the error message tells you they're full, so the pads must be replaced by a certified Epson technician.
I think it best at this point to provide a couple of links so you can take a closer look, and make a decision as to how you want to proceed:
1. This link explains how to get to the waste pads and replace them:
2. This link explains the issue again, but also provides a software tool that can be used to reset the counter:
I do hope you find this information useful and satisfactory as an answer.