mis-informed

I signed up with Virgin active in August 2017, at the time I was working from home and therefore, was sold an off-peak package. Which was explained and displayed to me as I could access the gym from 8am to 4pm then again from 7pm in the evening. An agent came to my home to sign me up and made the above very clear. Payments were deducted, R275 monthly. I only first visited the Mitchells' Plain branch(to which I signed up) recently and to my surprise, I was informed I am only able to access from 8am until 4pm and not any other time. I spent over an hour waiting and with a consultant trying to gain some insight as to why I was apparently misinformed by Jared, the agent who initially set up my contract. This has been an extreme pain and inconvenience, as I am once again office-based and would like to access the gym after 7pm, which to my knowledge was what I signed for, however this doesn't seem to be the case. Currently I can only use the facility over the weekends, which is not ideal and not why I signed up. I would like some resolve!