T+2 is asx settlement. You have made your trade but you will not receive funds into your account until they settle which is trading day +2 days.
And don't worry, i'd say 90% of us here have had a lesson like this at some point in time. Kudos for selling at 50% ish loss and not riding it out to 90%+ loss over what will be months if not years of pain with this one.
GSW Price at posting:
58.5¢ Sentiment: None Disclosure: Not Held