No spare key and rust

Took delivery of my pre owned 2023 hyundai grand i10 on the 22nd November 2024 by sales consultant Sylvester. I was only given 1 key for the vehicle. No spare key. Was given different story all the time about the key being cut to the person who will cut the key coming to my house to do it. Till to date the 25 July 2025, no spare key. Plus now I have rust starting on the boot. How is it possible for a 2023 model starting to rust. I would not advise this branch to any of my family, colleagues or friends.