Everytime i want to change the email, I get a confirmation email to my new inbox, I confirm it, and right after when you access 'edit profile', you can see instagram changed the email back to the original one. I have test it with multiple accounts using elite proxies, same result. I don't use massplaner or anything else, those are new insta accounts created like a week ago. Do you have this problem? I found somebody with the same problem here, but he fixed and doesn't want to share how.