Purchased a 1.6 Polo Vovo in November 2023 from a private buyer. Upon checking the car out everything seemed fine. Weeks into owning the car serious troubles started to arise with the vehicle - and could not even be driven.  Took it to a mechanic and the entire engine needed to be redone which cost so much money - well around R15 000.

A year later I started experiencing more problems with the car and decided I did not want to spend money on the car again as it was becoming too much financially. I decided to put it up for sale and clearly outlined the issues/faults that were experienced with the car. With few minor issues and fixes, the main issue was the throttle body causing poor acceleration.  This was clearly stated and outlined to the buyer. 

when the buyer enquired about the car I told him everything I knew . He insisted that the car was his and that he was willing to come early morning to purchase the car. He also knew about the outlined mentioned issues of the car before even pirchasing yet still insisted. I even insisted on him towing the car home given the issues but he insisted on finding his way by getting the throttle body and fixing it there before driving home. 

The deal was however done and all papers provided. 2 days in he informs that he no longer wanted the car as it has too many issues, even when he was clearly informed of all the issues. whatever faults he encountered was on himself, and I had no clue thereof. 

Can he insist on wanting the car returned? Or is the deal done and he now has to sort everything himself?