Payment via Phonecall
From TrackmaniaServer Wiki
If you pay via telephone call a telephone number will be displayed after you enter the bill-informations. You have to call this number while you keep the browser windows open to see the current status. Stay on the phone until the call will automatically hang up. After the payment is completed, your money will be immediately credited to your account. Telephone calls will be handled by our Partner Micropayment. If you have problem with telephone payment , please contact the support from micropayment. http://www.micropayment.de