BAD SECURITY

Planet fitness overall is a good gym i really enjoy gyming there. Unfortunately they just let anyone into the parking lots , as a result of the negligence by security and planet fitness, my bike got ****** in broad daylight my bike was loaded onto a double cab bakkie and drove off. So how can i ever go back knowing someone stole something so dear to my heart, in a supposed secured environment?? Im seeking legal action for damages. So bikers please , consider coming to gym with your cars.