log into my battle.net account, click on Digital Purchase on the right, then continue, then select payment method and enter my CC's CSW, then check box that i agree, then click continue, then get this error.
The following problems have occurred:
There has been an error processing your request.
For assistance, contact Blizzard Customer Support.
That error generally involves an error processing the payment specifically, Xemtra.
Before contacting Account Services for assistance, you may want to contact the bank or credit card company to see if there would be any reason they would block the transaction and to verify if the funds are available.