Reconnection fee

Last month I made a cash payment as I was advised to do so even though I have an active debit order, I was never told that the debit order is no longer active. This month the debit order did not go off and the services are suspended, I am being charged a reconnection fee of R50, why am I being charged that when you did not attempt to collect a debit order? I need to you to reverse that reconnection fee