PS4 Controller model CUH-ZCT1. Released in November 2013 by Sony Computer Entertainment, this six-axis, 3.7 V lithium ion battery controller is uncomplicated to repair. (NOTE: Teardown guide is NOT for this model)
If you got it off eBay, there is a Buyer protection program. If you bought it elsewhere and used PayPal you can contact the seller and file a protest with PayPal.