FAULTY LAPTOP BOUGHT AND THEY WONT EXCHANGE

I bought my daughter a laptop in or around December 2019. Within 3 weeks of her having the laptop it started giving problems - a blue screen and then just switching off randomly. I logged a return (ref: RRN-6613-77e8) and took the laptop back. On 2 January 2020 I was told we can collect the laptop. Their technician said there was nothing wrong with it he had watched movies etc. and used it for a few hours and there was no problem. They refused to do an exchange or refund. Since then the laptop has got worse and worse switching off and blue screen more frequently. Takealot does not respond to my email notifying them that the problem is not sorted out. My daughter is a waitress and does not earn alot and she bought the laptop to study through unisa and to spend R4000 is alot of money for her.