Epoch
Epoch is a payment services provider. Typically, web sites will use them for some kind of periodic charge. The problem comes when someone did not understand that it was a periodic charge and/or the merchant web site doesn't honor a cancellation request, citing the terms of the agreement when you signed up.
Their billing support page at Epoch.com - Credit Card Processing and Customer Billing Support should help you at least determine what web site you're being billed for.
