The RoadSave app is only available in South African app stores.
If you see a message "This item is not available in your country." when trying to download the RoadSave app, you'd have to change your country in the respective app store.
To change your country in your app store, please see below.
Google Play Store: https://support.google.com/googleplay/answer/7431675?hl=en
Apple App Store: https://support.apple.com/en-za/HT201389
Huawei App Gallery: https://consumer.huawei.com/za/support/content/en-us00685413/