dont know if its worth shot

but under the boot floor at tha bck ( i dont know if the fuel tank is covering it) thers a grommet that the wires come through to go to the tank and fuel pump

push the grommet through and it should be wide enough to get a solid stick or something in there and try and unlock the boot relase mechanism inside as ots juts a slider

if not then your going to have to do some damage or make your self a car break in kit to get behind the door and unlock it from inside