Hello,
Sorry to hear you are having issues. Not sure what criteria are consider for someone qualify for previous version user upgrade discount. Perhaps you can raise support ticket using the link below, use "Ask a question" option. Include all information details. Remember to record down the ticket number for future reference if needed. Do not raise multiple ticket, that will make your ticket back to the end of the line. Send once and wait. Ticket will be answer by the order they send in.
https://stardock.atlassian.net/servicedesk/customer/portal/4/group/13
Thank you,
Basj,
Stardock Community Assistant.