I dont understand what you are saying, sorry. "Some things popped up on my phone with a code" is to vague to try to help you.
Teslas directions for setting this up are online, here:
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Set up Multi-Factor Authentication
You must register at least one mobile device to enable multi-factor authentication for your Tesla Account.
You will need your account credentials, a mobile device and a third-party authenticator app to complete the set-up process.
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So, how did you complete the setup? The answer to that is in the "some things popped up on my phone with a code".
As. for "what can I do?"
You can contact Tesla for assistance, like someone did in the following thread here:
How to contact Tesla if 2-factor authentication device or app is lost? Multi-Factor Authentication | Tesla Support says "If you cannot access your registered device or your backup codes, contact us." However, the "Contact Us" button on Customer and Product Support | Tesla Support requires a...
teslamotorsclub.com