Check your order confirmation email as soon as it arrives. The sooner a mistake is corrected, the easier it is to fix before the order is sent to the publisher.
What you can fix yourself
- Wrong address: change it from My Orders. See How do I change my address?.
- Wrong magazine or term: cancel the order from My Orders within 6 months for a refund of any unsent issues, and place a new order.
- Ordered twice by mistake: cancel the duplicate from My Orders.
Everything else
Contact Customer Care with your order number and exactly what needs to change. Once an order has been sent to the publisher, some changes (like changing both the name and the address) are no longer possible, so the sooner the better.