AgriBus-NAVI is displayed as a free plan even though you have already joined the standard plan.

Follow the instructions below.

1. Did you try to synchronize after having AgriBus-NAVI log in to AgriBus-Web?
<Synchronization method>
https://support.agri-info-design.com/hc/en-us/articles/360046471493-How-to-Synchronize-to-AgriBus-Web

2. Are you logged into Android with the purchased Google account?
<Google Help desk>
https://support.google.com/googleplay/answer/2521798?hl=en