Folks! An area where you are able to control the errors that you experience on your purchases, is to use the summary page provided on checkout.
This will eliminate the need to request your money back and be disappointed when they are not able to offer it.
If you wish to make changes to your order this will allow you to click the orange F to the left of your checkout screen to start the process again. Never select the browser back button because this will create more problems than can be solved.
This is the best advice that I can offer, my wife used to work there, and she had to leave because of the stress of not being able to help with things that the customer has control over. These guys are not bad at all, but match your expectations to what they tell you on the information pages rather than what you think the company should be.
---hope this helps. Alot of disappointments will be eased if you do.