what epson model is it based on? If it is 1290 I can give you epson maintenance software that can reset waste ink counter. This may help. For other Epson models you can google for it. That's how I have found mine for FreeJet 290. It costed me $5 only. The free one I found before did not work.
There is a website that sells them as well as service and users manuals.
Also it is a good advice above to disconnect it from power outlet and wait at least 90 seconds.