Your ASC Sales Rep is the best point of contact for updating the license. I believe the pop-up expiration warning even provides the team mailbox address. Alternatively, you could send an e-mail to the ASC Customer Support asking to have your request redirected to the Sales team or your specific Sales rep.
Sales: QMSecuritySales AT hp DOT com | +1 -866-774-2700 x1
Support: QMSecurity-Product.Support AT hp DOT com | +1-866-774-2700 x2