Empty Promises and horrible attitude

I paid Matilda (the owner) R3,500.00 for a service she is not willing to deliver any longer. I reached out to her in July, and she helped me get my learners which I had paid R1,500.00 for and this was a success. Now after the learners I reached out to her and asked her assistance with getting my license, and i explained to her that I need to have this by the end of September of which she agreed. After i had paid the amount i found myself following up with her more than i was supposed to. I had to follow up on which dated the instructor will be coming on a number of occasions and when i did, it's either she was stuck at the testing grounds or her instructor was just not going to show. I have figured that i will not be getting my license on time with her and i think i deserve to get some of my money back as the service agreed upon to begin with is not something that will happen. I have since ran out of funds and in the near future will be out of a job as me keeping my job relies heavily on me getting my license. She also just doesn't care about her customers. Is there anything you can advice me on or how can i proceed with getting my money back at the least?