Tata Nano — servicing at service center

Address:

Rohtak, Haryana

My name is Sandeep and in the last two months I paid twice for servicing my car's AC and every time they said that AC is working fine but after 3-4 days it stop working again and its the third time in last three months that they want me to pay for the same problem of my AC again. I am sick and tired of this, is this what you call customer care. Please do something about it or I have to take other actions.