Hello, I’m Virginia, a fellow user like yourself.
Sorry to hear you’re experiencing problems.
As we’re fellow users here & not Microsoft we have no access to accounts so cannot remove the 2fa security.
Removing the account doesn’t remove the 2 factor authentication & can lock you out of the account.
You would need to use one of the backup codes created when you added 2fa to the account, once logged in you then should remove 2fa & set it up again or if the app was set to backup to the phone’s cloud then you can delete the app & during set p it will give the option to use Recovery, once this is selected it will install all the original codes including for the MS account. If not then the first option is required.