You can unblock a user account from your profile
- Go to your profile and click on profile menu ( 3 dots) in the righthand corner and click blocked users.
- Find the user to unblock and click the X to unblock.
Or you can unblock users from the account settings
- From the main timeline screen, click on the person icon in the top righthand corner.
- Select Settings, then Account and choose Blocked Users
- Find the user to unblock and click the X to unblock.