Planet fitness not treating customers fairly

I was persuaded by planet fitness Menlyn to switch from virgin active on the following basis promised by them - because I was on vitality I would continue with the amount I was paying for vitality and I would have 3 months on the virgin switch promotion where I would only pay R99. I agreed and signed up. After 3 months my fee changed to R599 and when I went to planet fitness Menlyn to enquire why, I was told that I need to pay R799 to be put on vitality. I told the consultant that this was never mentioned to me. Her response was that the person who signed me up didn’t work there anymore and therefore could not verify what I was saying and so there was nothing they could do to assist me. The manager was extremely unhelpful and was unwilling to assist only told me to go onto the website and click on “talk to us” and call customer service to cancel my contract. When I called to cancel I was told cancellation would cost me well over R3000. I was **** to and misled and nobody is willing to take accountability. I would either like my contract cancelled at no cost or the R799 vitality fee waived.