Worst ownership experience ever

Excellent car , worst service experience. I got my car serviced for accidental repair at Unity hyundai, Azadpur. They repaired my AC condenser with adhesives and delivered the car. I came to know about this after a few months when my AC stopped working. On reaching back to them, they said "You should have checked the car before delivery". Do they expect me to get the complete car dismantled , check for thier faults and then rearrange. Good that they are in India, If they were in US they would hwve been sucked to bankrupcy. And out of all, Hyundai is not with us to help.