It took me so much to squeeze this from them I decided to publish these codes here.
The guy seemed pretty keen on reminding me 4 or 5 times during the call that the codes wouldn't work along with the CallWaiting.
Of course, The codes worked without a hitch.
The call would have taken 4 minutes instead of 30.
CFNA (call Forward No Answer)
on
*10 0X XXXXXXX#
off
*710#
CFI (call Forward Immediate)
on
*11 0X XXX XXXX#
off
*711#
CFB (call Forward Busy)
On
*13 0X XXX XXXX#
off
*713#
VMS (Switch Voicemail off and on and change the Ringing time yay!)
off
*767#
on
*67#
*68xx# <----- where xx is seconds before VMS divert.
#


