GO Health Fairlands - no one can be contacted they are debiting my bank account

GO Health Fairlands is continuing to debit my account even after my contract term has come to end. I have been trying to get hold of them, no one is answering their telephone, the email that was provided to me is not working, the gym is closed and FNB bank said they cannot stop the debit order because they keep on changing the reference number. Anyone using Go health Fairlands club, please help if you manage to get in contact with them.