Support for appointments+ and not getting notifications

I left this msg 24hrs ago, I need some help with this unresolved issue...why is no one getting back to me?

Hello,

I don't think I have changed anything on the back end of my site but I just realized that I'm not receiving notifications when people book(they were going to spam now they aren't going anywhere).... Also after I book them they aren't receiving a confirmation e mail and neither am I....Please get back to me asap
thanks
Droughan