Hyundai Motor India — Engine fail just after 70000km even after serviced periodically by authorized hyundai service center

I purchased Hyundai car Grand i10 Diesel era model in March-2017 and car is always serviced at authorized Hyundai service center under specified time frame. Last service was done in Dec-2021 and in month of March-21 i experience pickup issue and notice sometime engine oil indicator light is flashing.I went to SAS Hyundai kanpur road Lucknow to check my car and hyundai person told me in your car engine back compression problem and need to repair engine.
I gave my car to Hyundai service center on 5 June-2022.First time they give me estimate cost Rs.2, 10, 047.56 and after discussion they gave me estimate Rs.1, 48, 533.00 and again after discussion they submit Rs. 1, 02, 491.00 Rs quotation .I escalate this issue to customer complaint number also but no one response properly. Over phone they always ensure me it is genuine case we will do best for you but do nothing. Finally i got call on 19 July 2022 from SAS Hyundai that your car is repaired and we give you 30, 000.00 discount and come and pay Rs.72, 000.00 and take your car.
I asked Hyundai team any car engine is heart of system and how can to easily it can be fail at run only 70, 000.00 KM all service are done on time from authorized hyundai service center only i am single person who drive this car from 1st day of purchase.How all of sudden after maintenance of 3 month car completely breakdown.
I am working in healhcare service industry and in my job i need to move on urgent to different location hospitals/labs to repair instrument.Mode of travel via car is best to provide speed services to hospital so that no one treatment stop due to our delay.
Hyundai took one month 15 days to repair my car-parts availability is major issue any time they dont have basic parts.
I suffered and harassments too much mentally and financially pressure where there is no fault .
Hyundai manager accept that from 2016 to 2019 they sell 6 Lacs i10 all over India and 7% engine failure rate which is too high for main part of any machine .
UP 32KJ6818 2018 Diesel engine fail at 35000 km and repaired in under warranty. HR01AR9993 i10 Diesel 2017 engine fail at 70, 000km and many more who got repair work outside due to costly hyundai service.