Unhappy Customer

I purchased a car from the mentioned dealership but I'm really not a happy customer at all from the 3rd week driving the car. The car was driving ohk for three weeks and all of a sudden a sound from the engin I couldn't make out what was wrong I contacted the dealership and they said I must bring the car so they can have a look so I took it. Two weeks after went and got the car drove for almost three weeks again and the sound came back I contacted them again and was referred to midvaal service centre where the car actually is currently. My experience with the dealership is not pleasing I always have to call and find out what actually is happening and I'm left without a car most of the time. I was not told of the existing conditions of the car till I came across the service plan book that had a job card from 2020 stating the axatly sound I'm crying about which to me is a pre-existing condition which is causing me to be without a car and that car was just sold to me just like that I confirmed with the previous owner and she said that's the reason she sold the car in the 1st place. I'm not happy for I'm paying a car that I don have most of the time due to this it's not fair to me as a customer to be running around where else this could have been sorted long time ago before I purchased the vehicle. Im calling every day and I'm still not getting a answers