Not sure if they do on weekends howver if your flight is so close I would consider the upgrade option.
Has your application moved into processing yet? It will move into either Processing-Digital or Processing before it would live to approve.
Digital route it is usually approved within 2 days, then a further 2 days for printing and delivery.
If it goes into standard processing you could be waiting as long as 10 weeks (I’m currently on 8.5 weeks in processing stage).