There are multiple ways to block someone on Instagram. You can also view your blocked accounts list from the Instagram app, where you can choose to block other people or unblock someone on the list. People aren't notified when you block them.
When you block someone on the VibeTag, you'll have the option to block their account or to block their account and new accounts that they may create.
If you don't want to block someone, you can delete their comments from your posts or you can block multiple people from commenting on your posts.
1 Tap on the Three dot on the right of the chat window
2 After the tap, you will see a few options
3 Tap on the Block option
4 You will get a confirmation to block that person and click yes again.
1 Tap that person's profile name
2 Tap the three dot on the top right follow button
3 A few options will show then tap block or unblock
1 Tap on your profile name
2 Tap on edit profile
3 Click on block and unblock users
4 Search for the user you wish to unblock