After umpteen hours spent on hold and being given wrong information, I finally found out that the *70 commands don't work in my area !
Apparently there are different colour zones depending where you live, I apparently live in a purple zone, I found that out by dialing 1765 from my home phone.
It seems it's *21 commands that you need
ie *21*number# that will divert all calls.
I can't find a command to divert after so many rings if the call isn't answered at home but there doesn't seem be that option on fibre telephones.
Can anyone confirm this please.
Thanks for the reply, although it was on virgin but not since the fibre phones came in, my brother is still on the original setup with virgin that uses 70 commands, oh well another downside to VoIP.