I`ve paid money for the Black Gems but I don't see them on my server.

If you paid from the Portal Window, you will receive BG to the Portal.
In order to transfer funds to a server, in the Portal Window open the lower panel for the server you want by clicking the small grey arrow-down button. In the panel, click the Black Gem icon of the “BG transfer” button. In the pop-up window you will be able to transfer the BG from the Portal to the Black Gems on the chosen Server without commission or interest.

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