Incorrect Bill

I have a been a member of planet fitness from 2011, since then I had never had any problem. until I moved branches from Lynnwood to wanders and back to Lynnwood branch again. I was over charged for the move, then my account was in credit, in December 2014 I send an email to customer services requesting them not to debit my account but to use my credit, but that never happen. In July 2015 I followed up the issue and I was promised it will be resolved after sending another email. In August 2015, I received a call from Lynnwood branch informing me about my outstanding balance, which I paid in cash/debit card at the branch on the 25th August, the amount was R299.60 but after paying I was unable to access the gym, which I was told to wait 24hours then my account would be in order, on the 27th August I phone the callcentre and spoke to Anthea Moatse form finance/account depart. she confirmed to me that account is in order and I changed my debit order date to the 25th of everything month, she confirmed that my next debit order will go off on the 25th October. my account is not corrected and they claim I own them.