What is 【１－８４４－５２４－３１３５】 American cancellation policy ?

https://stubhub.community/t5/Events-and-Venues/What-is-%EF%BC%91-%EF%BC%98%EF%BC%94%EF%BC%94-%EF%BC%95%EF%BC%92%EF%BC%94-%EF%BC%93%EF%BC%91%EF%BC%93%EF%BC%95-American-cancellation-policy/m-p/261831#M112070