Our first recommendation would be to make sure that your internet connection is stable.
If this is not the case, our Customer Support PAC-MANiacs can come to the rescue. Reach out to them via the "Contact Us" form and they will be able to assist you further!
Also, always keep in mind that Tournaments Medals and Prizes are awarded only when the Tournament in question is finished, according to the rank you obtained when the Tournament ended.
Please keep in mind that ranks may vary and are dependent on the score earned. Other players may overtake your rank while the Tournament is still active. To make sure you qualify for a Medal, please check your rank right before the Tournament is about to end.
Caution: Ranks can change from one minute to another depending on how many users score higher than you during that time!