Ability to sell phone card vouchers online via virtuamart 2 & joomla 2.5

HI i am building a website that will be selling various phone cards online. i need a system that will email and show the customer a pin code product after payment has been cleared. The system needs to run with virtuamart 2, and joomla 2,5... I need the ability to upload .csv list of voucher codes to the database as products, or input them manually in the back end.