Looks like it was actually from 21 September 2014 according to mybroadband forum users.

http://mybroadband.co.za/vb/showthre...rfer-new-hours

I only got an sms on 27 September 2014 saying,

The nights are getting hotter with an extra hour of Night Surfer! You can now enjoy surfing the internet from 12am to 7am instead of 11 pm to 5am. T's & C's apply.