Outstanding refund - excess deduction

I recently cancelled a contract with Planet Fitness Lynnwood. Was told that the cancelation fee was R1495. After canceling the contract I noticed that an amount of just under R2000 was debited from my Bank account. When I called Zonke at the help Centre I was promised that someone will call back to correct the error. Still no one has called. Ironically I receive several calls each day from Planet Fitness staff asking me to join their gym. Absolutely pathetic service. Would discourage anyone from joining.