Planet Fitness - Impossible to cancel

My son with a metal illness was nagged to sign up for a Gym Contract. He was in Matric, No income, just turned 18, He now started studying, and no facilities nearby, and cannot pay the fees, and the cancellation fees is high I went to the Centurion Gate Store, Spoke to the manager, i Think it Craig, for assistance very eager to help, when I was there, but now 2 week, calling, always in a meeting, never available, leaving message, don't call back, seems me to visit him personally again, I am saddened to the feedback