Our Carta admin left the company and took the 2FA access with them. How did you recover?

Our previous finance lead was the one who set up our Carta account. She left a few months ago and we recently found out the two-factor authentication is tied to her old phone number. We can't get into the account and we're not sure what Carta needs from us to verify we're the rightful account holders.

Has anyone gone through account recovery in a situation like this? Wondering what the process looked like and how long it took.