Unhappy client

I took the car to them for fault finding on the 6th of July 2023.They told me that the problem is left wheel bearing. It was replaced but the car still had a problem. Mind you I paid them for fault finding. Took back the car and now they said is clutch (something) .Took it back again. In short I have been going pillar to post with my car issue since the 6th and was advised to buy new mags which cost me approximately R13000.00 and the manager said should I have any problem I must come and talk to him.The car still have a problem and went to them on the 10th August. Was told manager not in and that he will call me.He never called. Went there again today and still no help.I feel I'm taken for granted cause I'm a black old lady.The money spend on everything is about R35000.00 Please help get my car fixed cause can't go anywhere with the car.