The Xara site quotes £39.99 for a contract extension for XWD Premium 365, but mentions:

Valid until April 22, 2018 £30 / A$48 upgrade discount Included as part of this offer: Photo Manager Deluxe (£34.99 / A$69.99 value) PC Check & Tuning (£39.99 / A$69.99 value) Fastcut (£49.99 / A$99.99 value)
Read more: https://www.magix.com/gb/web/xara-web-designer/

Does this mean that there's a £30 discount (i.e. the price after 22nd April will be £30 higher) or does it mean that the discounted price is £30? When I try upgrading the system still tries to bill me £39.99. Thanks