You're not getting 1 billion credits. I doubt it ever said it would do so, as neither our dev team nor any other player has reported this. However, we'll keep an eye out for it.

Its far more likely that you misread it. And you definitely received the correct amount of credits.

As for the rest, we can't fix in-game issues on the forum. If you have an urgent issue which needs to be corrected, you can contact Billing Support at the link from the homepage and they can look directly at your account. Thanks for playing!