Having a problem with the keyfobs on the Lupo GTI. We were parked at the supermarket and when I came up to the car the buttons on the key were not unlocking the car. I placed the key in the drivers door lock and turned it when I opened the door the alarm when off and kept on going for a good 5 minutes. I even tried turning the key in the ignition but the alarm kept going. I ran back into the shop and purchased two new batteries and placed them into the two keyfobs I have but both are not working