Hyundai Motor India — grand i10 engine block complaint in 26000 km

Address:

Kozhikode, Kerala

I have owned a 2014 model grand i10, last month i have done 26000km. I have properly completed all the my services from authorized service center of hyundai.
After my last paid service i have noticed that my cars engine coolant level is going down after each ride. And i always used to top up coolant level each time. I noticed that this coolant is coming out from the engine case. And i went to the showroom and told about this complaint. Now they are telling that i need to replace engine block it cost about rs 25000, and at the time we replace engine block we need to dismantle many things like piston, rings etc. And it is like an engine work.
I don't know what to do. Is this is some type of manufacturing defects or not?

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