Film update. Waiting for actresses and actors becoming frustrating

Left a little frustrated with my actress and actor. I have messaged them a few times and as the actor is the friend of the actress I have no point of contact with him so still haven’t received the headshots. I have also messaged her letting her know that everything is ready to shoot when she is available and I have had nothing back. This is starting to become a great concern as the dress was made with her measurements so to find another actress would mean trying to make another dress or buying one to fit her, which I really do not have the time nor money for. It is frustrating as I feel we are already to film but cannot confirm any dates to move the project forward until I get a response from them letting them know when they are available to start or if worse comes to worse they can no longer do it, in which case I will have to try and find another actor actress. Which could prove too short notice.