I want to set up a new business email, but link it to my old email account as it has a different business name.

So My current email is info@beardofliverpool.com and I want it to be info@beard.com.. it will also be linked to my new domain www.beardlimited.com.. previously www.beardofliverpool.com.

I try and set up a new email but it says my domain is already registered with it.. and when I request a new password to see if this is so.. it send the password link to the email I cant access? 

Hope this makes sense ? 

Im a little stuck !