Zone Fitness review: I am complaining about services and charges at zone fitness campus square

On May, I decided that I wanted to join a gym around my institution since I am a student then as I was walking around Campus Square, a guy from zone fitness told me about their gym and their student promotion during May. By that I was interested since I was also looking for a gym. After that I was told to pay R100 joining fee then I'll pay R250 in the following month for 12 months. It also sounded like a good deal because I can also get a personal trainer. So then I agreed as I thought that I could afford it. I only used the gym for 3 days in May, then in June till today I didn't go to the gym and they call to check why am I not using the gym. From July I had a problem with my bursary and so I couldn't pay my membership. In August they called to remind me that I have outstanding payments. Upon hearing this, I was confused because when I was defunded by my bursary, I decided write an email and to go to the gym to inform them about my situation and that i wanted to cancel my membership, I was told that I needed to pay all my outstanding payments and on top of that a cancellation fee which is more than my outstanding payments, only then will my account be cancelled. What surprised me the most was that there was an extra R2000 added to my outstanding payments. Another thing which is confusing is that they expect me to pay for the services I didn't even use. I only went to the gym the month I paid only the joining fee. Now it's like I am paying for services which are not offered to me. This overwhelming in a way that I even got a message that my account has been sent to the debtors collection and I should pay all the outstanding amount by month end. This is affecting me personally and academically because I am stressed. I can't take this anymore.