Debit order error

I have a contract with Virgin Active and my agreement is that they must debit the premium on the 20th of each month, however Virgin active did not keep to agreement for the month of May and debited my account on the 01st June which resulted in bank charges as i had not catered for the Debit order, I phoned into their call centre hoping for a resolution/explanation and was promised a call back as the consultant blamed the error on their systems. The consultant took down my ID and i have not heard from them since. My card number is ***. The bank charged me R90 and i want this reimbursed back to me.