LACK OF COMMUNICATION- NOT HAPPY RENAULT CLIO CLIENT

my Renault Clio had issues of not picking up the power/speed on step hill and it has the msg on the dashboard saying check anti pollution and hill assistance...I called them they came and pick up the car, I gave them 1 month full to fix my car and when I call them to ask how far are they and they took me pillar to post to get ma car, I had to go there and wait while ma car is been fixed...there was no test drive on the car after it was fixed and I had to drive hrs. to home with the car...when I come back I had no issues on the way BUT I have realized that the car has an oil leakage I took it back on Saturday as per arrangement but no 1 was at the repair spares I called no answer . then on Monday they promised to come and fetch the car until now is been 3 weeks I took the car from them no communication and when I try to get communication they say they have ordered the seal they are still waiting. now the msg from the dashboard is back "check anti pollution"...I am so scared of driving the car coz I don't know the damages I am doing while driving it I have also ask them if there are no damages when I drive the car, no 1 is responding to my texts. I felt over powered as I am a woman and not treated fairly ..…CENTURION AUTO CLINIC please fix my car.