1) Via in-game settings
Open the settings (the cogwheel in the top left corner of the screen):
Tap on the blue button "Support" to contact our support team.
In the upper right corner, tap the chat button:
2) From the loading screen
Click on the icon in the lower left corner:
In the upper right corner tap the chat button:
3) You can also contact us by filling out this form.
Please describe in detail your question or the problem you have encountered. Also attach screenshots or videos illustrating the situation.