Poor and unfair service

I bought a car from them in September 2018 delivery was on the 21 I was assisted by Siya the car is a Peugeot 208, on the 4th October i reported that a engine fault light was on, they took it in they came back and said fuel was contaminated, reset the light, a week after the light came back they took it again and advise me not fill up and certain fuel stations as they fuel is not right, reset the light, again a week after it came back and I told them, they took it in they said the catalytic converter is blocked and it needs either a mini cat or decatalised, they told me the exhaust was not covered under warranty, they quoted me R1800 to put in a min cat, I wasn't happy with fixing a car that was only less than a month with me, they took it and said they had decatalised it but now the fault light will not go away since the converter wasn't changed, when they returned the car the exhaust was licking and it had no power, I told Siya I wasnt happy with this, how will I know of any other faults going forward, I asked him to listen to the exhaust as it was making a different sound, he said there was nothing else they can do, a week or two later another fault came up with a service light and this was affecting the aircon, again I reported it to my sales person he took it came back and said there was a problem with the fan, they will fit in another fan, waited about a week nothing, last week Monday I told him the car was overheating now I cant drive for long a big stop popps up, he said they would book it in on Wednesday keep it for two days just to make sure there are no issues I told him I planned a trip to Nqutu on the weekend so I need the car back by Friday, today I asked in the morning about the car he said he will check, then he comes back to me just before 5 saying the car is not fixed they will have a fan on Monday I will only get the car on Monday, this has gone for almost 3 months, i feel this is really unfair to me as a customer and very inconveniencing as I have to plan my own way to travel an I need to fetch my child from boarding school this weekend, what am I suppose to do now, I want out of this deal I will look for another car, i feel i will have even bigger problems if I keep this car.