Preply Tutor Missed Class and Stopped Responding

I booked a lesson with a tutor on Preply, and when the class time came, the tutor informed me they weren’t available and suggested rescheduling for a later time. Since then, they have not responded to my messages, nor have they made any effort to reschedule the lesson. The most frustrating part is that there is no way to contact a moderator or administrator on the platform to resolve this issue. I expected better support from Preply, but I feel stuck without any assistance. I am asking Preply to address this promptly and ensure my issue is resolved, as I paid for a service that I did not receive.