Hello Soldiers, It's Black Squad team.
We are aware that there are players who did not receive the competitive match season 4 rewards yet. We have been checking the issue, and are trying to solve it as soon as possible.
The rewards for the affected players will be sent after the investigation.
We apologize the inconvenience, and appreciate your understanding.
Thank you for your patience and we will do our best to reach the best solution for the issue.