Bad product

Bought an Epson ink tank with the understanding that it could be reset once. We registered the product on the webpage when we bought it, but now find any information or link on how to or where to reset it.

I was told by the reseller that printers only last for a certain time-period or can only print X amount of pages. The printer will stop working at which ever of the above 2 comes first. We can then reset the Epson Inktank printer to start printing again. (But only once). This is why we bought the EPSON brand. How can a product be made to only last a certain amount of time, and then just by a reset button work again?