Krsa Hyundai — krsa hyundai - poor service

I have given my car to fix the clutch issue in jan 2019 and they charged me 8k (Approx) for replacing the new clutch cylinders. The car did not ran not even 500km i got the issue again.

I asked them to refix the clutch issue at free of cost. But instead of replacing with new part they replaced with old master cylinder. They did not inform me about this and when i asked them why you fixed old part, they given poor response saying that they given temporary fix and they charged again 1700 saying it is for labour charge and for oil.

And again within 100 km the car faced clutch problem again.
Now they are saying that they can't fix.

I request hyundai to fix this issue at free of cost.