No internet connection

[#1]

Hello, yesterday a engeneer installed my new plusnet hub. I have the blue light, but all my two computers and my phone are not able to connect to internet, only the plusnet homepage. They are connected but no internet access. In my home the broadband username is not mine, but generic username: setup@plusdsl.net: this is the unique strange thing that I found.
Could you help me? Thanks

[#2]

I solved. I changed the username, my username instead of the generic username.
I'd be nice if the service gives us the right instructions to proceed...