Cherry didn't know at all that the platform had sent her messages. Neither did she understand things like customer service and so on. She was engrossed in the game, so she didn't reply to the messages at all.
As a result, when the customer service staff didn't get any response from her, they used a photo of Cherry from that one and only time she had revealed her face and her mask had dropped off for the contest. Then, they sent her another message:
'The photo has been uploaded. We are currently in the registration phase. The contest will start tomorrow. Opponents will be randomly assigned when it starts. We look forward to your great performance in this contest!'
But of course, Cherry wasn't aware of any of this.