The quickest and best way to receive support for Fatal Raid is to send a support ticket through the game itself. You can do so by following these steps:
1) Open the options menu by pressing the cog icon on the upper left corner of the main menu
2) Press the 'Account Info' tab
3) Press the 'Send Inquiry' button
That will take you directly to the support network, and allow Selvas support agents to respond quickly and efficiently to your inquiry.
Alternatively, you can send a support email directly to firstname.lastname@example.org