create a pop up alert for blocked clients
There should be a pop up alert for blocked clients that call the salon and try to book over the phone, instead of just disabling the regular booking actions and getting a notification that the service provider does not offer that service. You should not have to go into the client profile to find out that they are blocked. This could cause uncomfortable interactions between the client and support staff.

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Kelly Redmond commented
This is SUPER important. There is currently no way of knowing, when booking, that a client has been blocked from services. A pop-up would be really helpful so ANYONE booking knows. We've had a few perpetual clients that book several appts a day and never show, closing our books for the day for their services. Money lost...please consider this as a high priority. We can't be the only ones dealing with this...and the other 25 votes - I'm certain there are more, they just don't want to go through the hassle of suggesting things to dev that should be a standard.