Unable to access old Manychat workspace – email already in use

Hello Manychat Community,

I need help resolving an account conflict that prevents me from connecting my Facebook Page to my current Manychat workspace.

Here is my situation:

• My current Manychat workspace is connected to Instagram @terre_deccezione. My Instagram automations are working perfectly, and I do not want to affect them.

• When I log into Manychat using my personal Facebook account, I access an old workspace with 0 contacts.

• A mandatory "Edit email" popup appears and cannot be closed.

• I entered my personal email address, received the verification code and entered it.

• Manychat then displayed: "Email is already in use by another user."

• This prevents me from accessing Settings → Messenger to check whether my Facebook Page is connected to this old workspace.

• I have already repeated the Meta permissions process several times without success.

My Facebook Page is Terre d'Eccezione.

I am on the Free plan, so ticket support is unavailable.

My questions:

1. How can I get past this mandatory email popup without creating another account?

2. How can I safely disconnect my Facebook Page from the old workspace, if it is connected there?

3. Is there a way to escalate this account-access issue to the Manychat team on the Free plan?

I would really appreciate a solution that does not require repeating the same Meta authorization steps.

Thank you for your help!