Completely Confused.

We have blueyonder emails connected to Virgin. Up until yesterday we could log in on our PC, laptop and through the browser on a mobile to check emails. We used to use Outlook but have been unsuccessful in configuring the settings since Virgin changed things.Now, we cannot log into our emails on the PC through Virgin in the usual way. My husband uses the PC and isn't computer savvy when it comes to setting things up. I just thought it was him not understanding something. Now I've had time to look, I too am baffled and a little annoyed. 
I can still get emails through signing in with blueyonder on the PC but, if I want to look at the account settings, it wants the secondary email. I'm reluctant to use that in case we lose access completely.
I added the secondary email Virgin wanted when I tried setting up our emails on Outlook, a Gmail one. I can log in with this and then verify the email on my mobile as I don't keep my Gmail account logged in on the PC. Then it wants to add another level of security. Using the email or a text won't work as it's going to my mobile so if I’m not around he can’t log in. Biometrics are no good either as it's a PC without that facility. 
Is there any way of removing my Gmail association so it goes back to being able to log on with blueyonder and password?
I used to be OK keeping up with changes but when things are just dumped in your lap with no explanation, it gets very confusing.
Thanks for any help.