Makro please refund me my money as a varsity student who is doing online learning I am not copying without a laptop.

This year April I bought a Asus laptop at Makro and the laptop kept giving me problems. 20 days later I took back the laptop. I received an email from one of the workers at Makro they asked me if i would like a refund or repair, i told them that i wan a refund since the laptop gave me lots of problems and i missed assignments and test because of that laptop. They then told me that i would get my refund since i do not want the laptop anymore. I have been waiting for their respond for weeks, I am starting with my exams next week, I have not been able to attend lectures nor complete my assignments since i have not been given any updates regarding my laptop. i am livid by the bad service i have been getting at Makro and this is not the first time. I have been trying to get ahold of them to ask about the status quo and non of my calls are answered. I need my refund so that i can start studying for my exams, it is really exasperating to see how young people are being treated by Retailers. Makro please refund me my money so that i can buy a better laptop brand.