There's something important about 2FA code, most of users do not know they need to keep the secret code saved to restore 2FA. If you haven't done it, you better change the 2FA binding and keep the secret key safe.
I don't have 2fa activated. Where can I find the option to do so? :o
you mean in Coinex or which exchanges you talk? Usually you go to your account setting and it is easy to find this option. It is very important to have 2FA but keep the secret code.