If purchased rubies are not reflected in your ruby total, please try the following.
1. Close Mario Kart Tour from your task manager, then restart the app.
2. Restart your device.
3. Tap Complete Purchase.
To get to the Complete Purchase option, do the following:
a) Tap Menu at the bottom of the tour-select screen.
b) Tap the Shop at the bottom of the screen.
c) Tap Complete Purchase at the very bottom of that screen.
・It may take 1-2 hours for purchases to be reflected.
・Please take care that you do not uninstall or delete the Mario Kart Tour game from your device.
If the above doesn't resolve the issue, please submit an inquiry via Support at the bottom of this page and include the following information in your inquiry:
・What was not resolved after following steps in the FAQ
・Purchase date and time
・Name of product purchased
・Number of times it was purchased