First of all, check your spam filters. An automated mail with the serial number can be determined as spam quite often.
If you have not found an email with the serial number in your mailbox, please, provide us with following information:
● Your full name, country and city;
● Version of the game, which you've bought;
● Your order ID (if remember);
● Your method of payment;
● Time and date when you've paid;
● E-mail, which you entered, when paying.
Please send all this information to our e-mail:
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Without such information we can't help you.