Hyundai Motor India — Rusting in my 2016 Creta both front doors

Hi
I have purchased Hyundai Creta in 2016, and my car's both front door top portion getting rusted just below the rubber beading. As it is only 5 year old car, I don't expect this to happen and which is worrying me a lot and feels discomfort on the quality of the Hyundai product. Please provide your comments on the rusting of the doors, and what advise you can provide on that. Waiting for your reply..

Thanks
Satheesh Soman