Admin fee charge of R456

We went to Virgin Active in Eco Park Centurion to change the debit order as my wife's bank account has changed. The first month we got a notification from her old bank stating that there is not enough money in her account. This cost us R120 admin bank fee(which I want back from virgin active). Then now the second month we went again to change everything and again the same thing happened but this time the bank charged us R336(which I also want back from Virgin Active as it was again not our fault). YOU OWE US R456 Virgin Active. Im thinking that this will happen again next month and then you will owe us even more. We have been Virgin Active customers for six years now and if this is how you treat people and cost them money we will move to another gym.