Unauthorised Debit terrible customer service

Planet fitness has debited my account for an increased fee without my permission, and according to my contract they should have contacted me 40 days before the account expired in order to notify me of the debit order and amount before debiting my account. I have been in contact with the wanderers' branch manager(Sean) and the customer care manager(Thabo) and have sent numerous emails and made over 20 calls to try to rectify this issue but was promised feedback on five occasions. I have requested to have their superiors contact me with no response. I am now being ignored and still am being charged monthly for a contract I do not want. I also want to report that I clearly asked the sales person I dealt with to make sure that once my contract was over which I paid up front, that it would not continue and was assured by him that they would contact me before any debits on my account was made. But this did not happen. I no longer want any association with planet fitness and feel as if I am being pushed from pillar to post by this company. I dont know why we need to go to such lengths to solve issues with planet fitness and why they treat customers with such disregard.