Very bad experience i need my money back

Very bad service bought a car last week Thursday cash.. when we left. The car did not even reach home .. it broke down we had to leave the car at some garage. Told our assistant he said the tour guy will collect the car the next day.. ask him is possible if i can my money back … because already i was not happy ... he said they will 1st find out what was wrong with the car.. their policy is we cant hav our money back we need take the car again after it has been fixed ..than they will take it back if its stil giving us the same issues …logged complaints.. the only thing they do is send ref numbers.. and they do not call back. Wednesday the guy said they have fixed the problem. We must come collect the car.. we went Thursday again this week .We did the test drive the car boom it did the same thing . They had to call their mechanic to restart the car again .. we told the guy no we no longer want the car can we have a refund ... the guy had to call the manager . Told him the same thing. The manager said he cant help us we must take the car with us ..like seriously how can you take a car thats had broke down on you 2 times …he is telling us about nonsense policies if we leave the. Car there it gona be our responsibility if anything happens to it.. thats car has been with them for days i never took the car home with me. And now that's we have to take a broken car home thats gona be our responsibility there was even more problems oil was leaking and lot more things thats were not even mentioned on their report …I need my money back .. I’ve already lost money because of this car …i was gona use it for school transport…now they still delaying me keep sending text saying they are looking at my case they will get back to me…since last week no one had given me a call. Regarding this issue . it frustrating. I need my money back ..