Poor Administration and servicing of customer

We have been members of Zone fitness since beginning of the year and beginning of August, we submitted a form to change out debit order details and date. We had to submit the form twice as we got feedback to say they "never received it, we must submit again". We got confirmation that date has been changed. We then go to the Parklands branch last night, we told our access has been blocked due to missed payment. We told the receptionist the story and she advised that there will be a double debit when the funds do go off. It has been such a hassle trying to change a debit order date and banking details. On the same day we did Planet Fitness one, we did other changes with 3 other service providers and there are no issues with them. Everytime we enter the gym, we have to be talking of the same nonsense - no sure why debit order details and date cannot be changes seamlessly. My husband and I are thinking of cancelling the gym and rather fight a real fight when they demand cancellation fees. This has been such an irritation, we regret why we didn't sign up with Virgin Active in the fist place.