Hyundai Motor India — service delay by 2 months

Address:

Kalambagh road, Muzaffarpur, Bihar, 842001

On 19 august 2019, i gave it to the service center i. E balajee hyundai, muzaffarpur, bihar to repair my creta eplus 1.4 diesel car. It has been 55 days despite any major malfunctions and i am still being asked to wait 10 more days. Why does service centre is delaying it unnecessarily when it is only a short of ac compressor? I found it because of irresponsible and lazy attitude of service persons. But as i am suffering customer what should i do now to get my car delivered back?