To have the wrong end of the stick
A misunderstanding
To get straight to the point / to cut to the chase
to speak directly to someone
To be on the same wavelength as someone
to think in the same way
In a nutshell
To summarise the main idea
To hear something through the grapevine
to hear a rumour
To fall through the cracks
to miss something important
To beat about/around the bush
to talk around a difficult topic
To get it straight from the horse's mouth
to get information directly from the source
Like talking to a brick wall
talking to someone that doesn't listen; very stubborn
to not make head or tail of something
confusing; difficult to understand