Star Nissan Vanderbijlpark Jaecoo j7 struggles

I truly had a bad experience with the star Nissan dealership company. I bought a brand new Jaecoo j7, and it’s now only 6 months old but I’m already experiencing difficulties with it, it had a knock on the engine then I took it to the workshop then more problems started. They said I must pay for the part because I damaged the car by running over a porthole, which I didn’t. Ok they tried fixing the car but it only took two weeks then it started with the same problem again. So we took it back then they said they will order the part and it will take 4 days for it to be delivered and it is now covered under the warranty, ok so now I ask for a curtesy car because I have to go to work, deliver my babies at school and mostly my brother is getting married this coming weekend and guess what they say they cannot help me with a curtesy car because they don’t any that is available 😔. I regret the day I bought that car, because I was hoping that it is brand new so meaning I will be to use it for a longer period but I was wrong about buying a JAECOO J7 at Star Nissan in Vanderbijlpark. I loved that car so much but I have too many doubts I’m even thinking of returning it back. Im truly hurt by this.