I have problems by logging in on instagram, how can I fix that?

[AC Question]

Hello everyone,
My Instagram account got deactivated for no reason. I only posted a selfie and some photos from my vacation. I made a new account but I still can't log in on my phone where my first account got deactivated. I can log in with my new account on my computer and iPad but not on my phone. Can anyone help me to get logged in on my phone?
Greetings Mathis