Bad service from tN

Bought a laptop Lenovo from MTN greenacres on the 26th of May 2023 ,the laptop was super slow from the moment I got it and I couldn’t return it cos I was not available on the 20th of June came to the store ad was advised to book it on with a technician of which they advised me that the issue is not covered on the warranty,It’s not even one month and I haven’t even paid for the contract the consultants are not helpful they are sending me to external technicians to pay at my expense and one just told me with the price of the Lenovo it’s bound to be slow is that even fair , ??