Log on to your account and check the shipping status using the tracking number- it may still be on its way or you can try using a customer service rep to help you:
To check the order status click the link below and follow the prompt -
Or to change or cancel your order click here -
According to the website from Light in The Box it is recommended to cancel your order if it is in 24 hours and you want to make a change to the order.
I hope this helps!