Overcharged and bad communication

Woke up to my surprise this morning with a debit order from Planet fitness Parklands in table view of R233.59, I'm supposed to be paying R87 because I'm on Vitality which I activated in August. When I called them so that they can refund my money, they said they cannot refund me and when I asked why the answer was that they only activated my vitality on the 14th of November and to my Knowledge I paid the Vitality activation fees in August, seeing that I paid the activation fees in August so that I can start paying R87 and to my surprise I'm still paying R233.59 and my vitality will only be effective in December. I feel like I have the rights to have my refund back, if the communication was right in the first place the money was not going to be an issue I would have understood, but no one told me anything regarding to when my vitality was activated until this morning when I called them to find out what was going on.