Found thread: (833) 908–0085 reservations
Number seems to be down
Number linked to https://www.bookunitedairlines.com/ with (866) 918-1914 which is also down
1914 lead to https://www.frontierairlinesinfo.com/frontier-airlines-booking/ has dead 844-902-2949
Honestly seems like dead OP to me now. You killed it Draco!!