I logged out of my Instagram yesterday, and I have been trying to get back in, but they keep sending a confirmation code to my phone. I'm getting the message notification after I request a code but then the message is blank without any code on it. They don't even have any support to email nor call. I guess when something is going on with your account, just Uninstall the app because they obviously don't care enough about their users to have support for when something is actually wrong.