We can't cancel an order if we've already made the disc and printed postage. You have a limited time to modify orders once they are placed.
Login, click the recent orders button. You will be able to modify orders if available. If you see a modify button, that function is available. If not, it's too late.
You may edit as long as we have not yet printed postage. We print postage often during business hours, so please modify orders right away if you see mistakes.