How to delete a contact on my iphone when there's no delete contact option?

All of my other contacts have a "delete contact" option when i edit and scroll all the way down. But there are some that doesn't. I just got this phone from my aunt so she still had contacts here. I deleted all contact but there were others left (who i completely don't know) in the phone and i can't delete them. I think they're all from facebook? I really don't know. I really want to delete those certain contacts because it's bothering me.

how do i delete it?

Have you removed all of her social networking accounts (Facebook, LinkedIn, etc.)? Contacts linked from a social networking account won't be deletable - you'd have to delete them from the social networking account, or just remove that account from the phone.

I have the same problem. Some of the contacts on my iPhone 7 don't display the "Delete Contact" option when I try to Edit them. I do not use FB or any other social media, so that can't be the cause. These are all contacts I've entered manually.