Brand new controller’s buttons not responding

I recently bought a ps4 controller but the buttons aren’t responding. It charges, the light turns on like normal and it can tell when there is a microphone connected but the buttons won’t respond. The only way to turn it off is if I turn off my ps4 and the buttons will work for a couple minutes and then they’ll stop responding. The controller doesn’t turn off and I even tried the pressing I the reset button on the back of the controller. If it is faulty is there a way to get a refund from Sony or is there a way to repair it?