Why wont my fuel pump shut off on a 2002 vw beetle?

-i recently replaced my fuel pump by recommendation from a vw mechanic. Now without turning the ignition switch the fuel pump runs continuous . Ive pulled the 409 relay and the pump continues to run. I disconnect the the pump overnight to save the battery which i also replaced recently. What the heck is going on?? This car has been a serious cash cow for me. I also have the flashing oil pressure sensor light going off at every stop. Will the pressure switch bypass the relay to stay on continuous? Im a day late from giving this car a cocktail in the drivers seat.....please can anyone help or has faced this problem before. I took it to a vw technician and he called out the relay panel under the dash possibly having a short but thats worse case scenerio. Im the second owner of the car and all the factory wiring seems to me intact. what gives?.....