Frustrated

I purchased a mecer laptop September 2021 at Game Trade Route Mall which started having screen problems in December 2021.Took it back to the store in January 2022 and it was returned 03 March 2022 with the screen being replaced. The lap top still has the same problems and even worse now that it shows lines or just go dark. We went to the store on the 26th of March and the store manager (Moosa) promised us that he will contact the manufacturer. I was called by Moosa to bring back the laptop and it was booked for repairs on the 16th of April, on the 5th of May I received an sms to go and collect the laptop, I went to the store but to my surprise my laptop came back with scratches of which it wasn’t like that when I booked it in, I then refused to take it. The laptop was booked in again on the 11th of May. I called the store last week and asked Moosa for feedback and he said he was on sick leave and will get back to me of which he didn’t. Today 14/06/2022 I received another sms informing me that the laptop has been booked in again. I have exams and assignments that I had to write using other people’s laptops whereas I bought a new laptop so that I can be able to further my studies with.I don’t want that laptop any more I want a REFUND. I’m so disappointed with their service no one even bothers to give me feedback.