I am assuming that you have your own online trading account and...

I am assuming that you have your own online trading account and that you did not use a broker.

Have you checked your order management page on your internet trading account.

I think you may have Sold 633 shares, and still have the remainder of the 12000 shares sitting in line to sell at 60c.

If you want to sell them at a different price, you will now have to cancel the rest of the order or you can leave your order in queue & wait for them to sell at 60c, if & when the share price gets to that price again.