No email notifications coming through on new company email

I'm posting this from my old  (personal) BOX account as I am not able to log in on the New (company)  Box account set up for me by the company I am now working for. They have recently set me up with a company email,  and now that that is up and running, I have been invited to the company BOX account.  No notifications have arrived,  I have tried setting up a new box account with the new company email address.  No 2FA notifications arrive to my new company email address.  How can I get help with this issue? I tried logging a ticket, using the company email address this morning... what if I don't receive those emails either?