zone fitness

This zone fitness handed me over to credit worx saying i owe them R6500 the agent who signed me up **** to me said i can pay 100rand and gym at any zone fitness,never explained anything,only to find out i cant cancel this ****,i never set foot in that gym my joining date showed 27september2019,R225pm meaning its a year and 2months mind you they were closed during lockdown for 5months never comunicated with the other they a devt collection company phoned me to say i must pay R6500 immediately they are croojs i want legal advise i want to expose them even on national television on speak out wpuld be much better