Car repair gone wrong

May you please help me with a company which took advantage of me because I'm a woman,on the 8th June i was stucked with my car at the gate of DIY in Bloemfontein whereby my car didn't want to start, because I was stranded and the neatest area i could ask for help was pine auto electrical & aircon services, i went there for help and i got helped since they took the car to their workshop and transported me home and i was told towait for the next day they will call me when the car is ready which they did but i was not satisfied with the fact that they diagnosed the car and the rare front light on the right was off and when i questioned about that and the diagnosis of the car i was given a convincing story that the diagnosis is done for thw specific problem not for the whole car, anyway i let it of but i bought the bulb and replaced it ,it is not even a month ago they've rrpaired the car today 26th of June when i started the car it was not starting whereas i have paid them, i called the company and i was given a guy who didn't even identify himself just told me that they have repaired what they have repaired and that doesn't mean the car would not give me problem therefore kindly ask for help.