Car service and spare parts in mangalore, Hyundai parts

Hey peeps, I own an Hyundai I20 (2019 model)
And i am looking for service accessories for the car to do the service on my own, rather than taking it to Offical service centre..

How to and where to find or buy accessories like Oil , filter etc

1. offline stores in mangalore
2. online too
3. or any Hyundai parts provider

Because I feel like the service given by Hyundai is too costly so I thought to do it by my own

Help me out to buy all things (oil , ac/oil filter , coolant )