Why won’t my credit card payment go through?
If you have had trouble getting your transaction completed, it may be due to a credit card error. There are a few common problems that could be the culprit. First, make sure that your name and address are entered exactly as they appear on your credit card statement. Next, please make sure you have correctly entered the CVV code – this is a common cause of transaction failure.
If you are a customer located outside of the United States, your address will need to be entered in the standard format used in your country. This information can usually be found on each country's postal service website. Sometimes the locally-accepted form of an address does not match the official postal service version. For additional help in determining this format, you may find the following websites helpful: http://www.columbia.edu/kermit/postal.html and/or http://www.bitboost.com/ref/international-address-formats.html.
If you still have difficulty, you may want to try submitting your credit card payment via Paypal as an alternative.