Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
The only thing you can really do is get another key cut by a dealership and then open the door/trunk like that. There is no way to break into the trunk and if the release on the door doesn't work you won't be able to get in.
If my answer has helped you, please help me by rating or accepting my answer. This does not cost you any more, it just allows me to be credited for my work. You can always ask follow up questions after rating or accepting. Thank you.