How can I get rid of a lot of instagram followers?

[324]

I have recently been getting many spam accounts following me and have used IGexcorsit to get rid of about 300 of these followers but it will not show any more of my followers that are inactive.
I still have about 1400 followers and it will not show me all of them. Whenever I scroll to the bottom it only shows up to about 500 users and they are ones that I know personally. How can I see all of my followers so I can block them all or is there an easier way

[Emily]

there is a ghost follower app