A method for secure payment transactions over a network between a support help desk computing system and a customer computing system is provided. The method includes establishing a chat session between the help desk and the customer using a chat application program; receiving a purchase order from the customer; communicating a unique URL payment link to the customer, wherein the URL payment link is configured for allowing the customer to establish communication with an order processing system to provide sensitive payment information to the order processing system; receiving the sensitive payment information at the order processing system communicated from the customer; encrypting the sensitive payment information; providing the encrypted sensitive payment information to the help desk, wherein the encrypted sensitive payment information is displayed in a masked format on a display of the help desk; and completing the purchase order using the encrypted sensitive payment information.