GRRRRRRRRRRRRRRRRRRRRRRR my petrol cap is broken, went to fill up yesterday, pressed the button and the flap opened as usual, but now it wont lock shut

i had to drive to crappy halfrauds to buy one of those locking cap thingys which cost f*ckin £15!!!!!!!!!!!! just so no one could nick my full tank of fuel GRRRRR me not happy
