New Contract Problems

I signed up in Sep and the sales person entered the incorrect branch code on my account so the Oct debit order failed. I was notified by SMS on 19 Oct. I was ill so I only returned in Nov and paid the outstanding amount which was the monthly membership fee for Oct plus 2 late fees which I don't think was fair to charge as they only notified me on the 19th. I paid up to date on 6 Nov and filled in a form to correct the branch code for the next debit order. I went again on 10 Nov and was informed that I now owe Nov fees and was then denied access. I didn't have my card with me to make payment so my trip to gym was a waste of time. How is it fair to deny me access when they can see I made a payment just a few days before and how is it fair to charge me 2 late fees when I wasn't even aware that the debit order failed and how it is fair to charge late fees when they entered the incorrect branch code? On top of that I have been informed that my tag is faulty so I need to bring my ID for them to give me a new tag. It seems that every time I go to gym I spend 15 minutes at the front desk when I could be gyming.