I was warhing youtube with my wifi on, but for some reason it used my data instead of wifi for watching youtubd, and i hax the wifi assist option turned off, now i have been charged $10 and only have 200MB till the next reset, in a month. Wondering id there is any possible way to get my data back and the $10 refunded
Optus might be nice and give you a hand as a once off good will but really, they don't need to. As harsh as it sounds, it's your responsiblity to make sure your phone is operating properly. Even though it might say WiFi is on etc their job is to give you a mobile connection when you want it. Your phone said you wanted it so they allowed it.
A tip for future, to be absolutely sure switch to flight mode and then switch wifi on. You'll know 100% that you can't use mobile data then.
Try asking them if they'll help out this time here - http://yesopt.us/chat2us
As @SamSam says might be worth a call but pretty unlikely.
If you have a Windows or Android phone you can set a monthly warning and cut off limit on data usage (that the phone measures accurately in real time not Optus).
If you use up the 200Mb you have left Optus will just give you another 1Gb (for $10) automatically.
Really sorry to hear that @ajbulich. We may not be able to credit the charge but can certainly in managing your data so that this doesn't happen again. Feel free to PM us here → http://yesopt.us/pmaman and we can discuss.