What is the contact number for checking the status of a Thai Pass application for a British citizen?

A user is seeking a contact number for checking the status of a Thai Pass application for their British citizen father, who is expecting to visit Thailand. There is uncertainty regarding the approval status of the application, and the user is willing to call a Thai number for updates. One comment reassures that if they received a confirmation (green tick), they should not worry as the pass will eventually be approved.