Update your Bookmarks to https://sites.google.com/view/gam--commands/home
gam info domain
gam info customerÂ
Omit addressline2 "<Second Line of Address>" if not needed. Or add addressline3 & state if required.
gam update customer addressline1 "<First Line of Address>" [addressline2 "<Second Line of Address>"] city "<City>" zipcode "<Post Code>" country "<Country Code>"
gam update customer adminsecondaryemail "<New Email Address>"
gam update customer contactName "<New Contact Name>"
gam update customer phonenumber "<Phone Number>"