Hyundai Motor India — High service cost

Address: Kodimatha, Kottayam, Kerala

Mine is a 2017 model i20 elite diesel and it has done around 55600kms. The car is originally under MGF Hyundai dealership, but it has still got warranty which is extended for 5 years. The second last service which I’ve done 5 months back at MGF Hyundai aleppy costed only around ₹10000 and I’ve still got the invoice. My recent service costed around ₹20, 000. I’ll give a summary.
Total cost of the parts - 5827.43
Parts GST - 6962.91
Labour charge - 12947.19
Grand total - 19910

The car is not even in Premium segment. It’s a normal 1.4 CRDI engine. How will it cost this much? I was really shocked!
After talking with the manager, I done the payment because I wanted the car by evening and I clearly made a decision in my mind that I won’t be dealing with that branch ever again. It’s better doing an enquire. I’m satisfied with Hundai, but not with Popular Hyundai Kodimatha dealer.