Hi Chief,
While we appreciate all of our players for their interest and commitment to the game, we have a zero-tolerance policy on unauthorized gem orders. These are gems that are bought from unauthorized and unsafe third-party websites or other sources that fund their activities with stolen credit accounts. Each purchase via one of these websites or service providers causes significant financial harm and distress to the victim of the credit account theft.
The only authorized and safe way to buy gems in Clash of Clans is through the game via the in-game shop. The payment of your purchase is then processed by Google (on Android) or Apple (on iOS).
In your case, we had no choice but to ban your account due to recurring breaches against our terms with regard to buying gems, despite our prior warning. I'm afraid this ban is permanent and cannot be revoked.