Only Cycle Map Africa 2024.10 even though .20 exists!??

Hi all.

My device, and Garmin Express, only installs Africa Cycle Map 2024.10 and not 2024.20 which is available according to Garmin link 

https://support.garmin.com/en-US/?faq=LR6HR5Xul6A9zoxySC5KM9

How do I update?

I've reset my device multiple times. 

I've uninstalled and installed the maps via Garmin Express and via the device map manager, both multiple times. 

Garmin support takes ages to reply and can't offer more than... try uninstalling and installing the map with Garmin Express. They are essentially useless.

Any tips?

Thanks

Martin