25% rebate for Parallels birthday offered but not accessible

In the German issue of the MacLife newsletter Parallels offers a 25% rebate on full versions and upgrades.
https://www.maclife.de/deal/paralle...tm_campaign=newsletter&utm_content=2019-06-19

When I click the link listed in that text:
http://www.dpbolvw.net/click-7942988-13045070
I only get the regular price. How do I get the upgrade price of 37,49 Euro?

 

Hi @BerndF, we had Parallels Birthday sale and offer 25% discount, but this offer is over now, and unfortunately we cannot provide you with any personal offer now.