When you receive a duplicate transaction error, the system is trying to prevent duplicate transactions from happening - the last thing we want is to bill you twice. When this error occurs, the transaction has probably already gone through, but for some reason, you didn't get the confirmation message.
To confirm that your original purchase went through, sign into your account, click the LexVid logo at the top right of your page, and scroll down to purchase history to see if your payment went through. You should also have received a receipt in your email.
If the transaction didn't go through, go bacl to the packages page, select your product, and fill out the payment form again. If that doesn't work, contact customer service at email@example.com or 877-327-1226.