Edit: Sorry for the confusion; I'm coming from Northern suburbs and the trip in general is not great without a car, I started out taking 2 buses and the connecting trips were unreliable (bus either doesn't show up or leaves before it's meant to)
I'm currently in a degree at Flinders Uni but the majority of my course work takes place in Adelaide CBD. Last year I used a discount provided by Wilson parking to get $10 student rate parking, but the discount isn't working as of this year. I rang them up and the person talking to me offered no help, repeating "you need to get a discount code from your uni". I told them I got the voucher via Wilson. He didn't help me so what are the options for a once a week park in the cbd at around the same cost?
Did you try going to your Uni about the discount code? It might not have been what you did last time, but surely given the amount of students that would deal with this sort of parking arrangement, the Uni would have someone there that knows what's available to you?