What plan are you on?
Entertainment is generally under the For You menu option, you looked under the Service -> Add-ons option?
Yes it was under service add-on's thanks I have spotify. So if I stream spotify on my pc (tethering my mobile for internet connection) is that part of the free data or only if I use spotify from the app on my phone?
You'll be fine : ) You're able to stream music up to a bit rate of 512kbps (the quality of your audio). As long you stay within that range, and you have the music streaming add-on, streaming Spotify will remain un-metered
(the quality of the stream depends on the account you have and the device your'e streaming off).
Optus needs to realise that not all of their customers are on the Apple ecosystem and therefore having more options for eco-system neutral apps and free data streaming to level the playing field.
It's fortunate that I've recently upgraded my plan to have a larger data inclusion, but it's very disappointing that Spotify data-free streaming has been taken off as a member benefit inclusion.