Cancellation pro-rata rip-off!

When I called a few weeks ago to cancel our gym contract I was advised to call back in the month and that cancelation cannot be done in advance. So I called your offices today on the first working day and am now told that I will be billed a pro-rata cancellation fee? For what may I ask you!? You've already taken your debit order for the month to make the contract paid-up, and could not accommodate my previous request deeming it advanced? Surely there should be some sensibility here? Kindly provide me with a complaints reference to escalate this to the National Consumer. I wonder how many other people are being ****** by your one sided process. Either change your process to allow \advance"notice or don't penalise your clients for your limited process capacity. At least it's done now - I am free of your continued inadequacies."""