@Tomislav_Plesa & @J_BONNER, the chat does get through to a live agent.
It’s not clear whether alerts are related to another account that has the mentioned email as username or the email account itself. In my case I suspect that it is another account. If it is other accounts then as a precaution one might want to change all passwords that use that email address as a username - or at least the sensitive ones.
If the source of the exposure is known then you might be able to get the combo list stating the password - which may narrow down the account. If the source is unknown then they can not provide the combo list.
Hope that helps.