Planet Fitness Gym and Saya Recoveries

So I owe Planet Fitness over R10 000 for only going to gym once and loosing my job thereafter??? Now they have a company called Saya Recoveries emailing me statements and harassing me saying I owe them money, how??? Are even gym's allowed to hand you over to lawyers when you loose your job and income to pay for your subscription??? Instead of worrying about putting food on my table I was supposed to worry about gym memberships??? Really now this??? Saya Recoveries