Thank you so much Gianluca it is appreciated. I was getting mind boggled by the 30 minute thing. I did change the query slightly to this:

select convert(char(11),close_date, 103) as [Date],

CAST(DATEADD(minute, DATEPART(minute, close_date) / 30 * 30 , DATEADD(hour, DATEPART(hour, close_date), 0)) AS time) as [Time],count (*)as [Total]

from vw_opencall

where evb_recipient_email like 'help@email%'

--I will be adding dates between so edited this part, just used dates for testing.

--and day (date_time) = '03'

--and month(close_date) = '06'

--and year (close_date) = '2015'

group by convert(char(11),close_date, 103),

CAST(DATEADD(minute, DATEPART(minute, close_date) / 30 * 30 , DATEADD(hour, DATEPART(hour, close_date), 0)) AS time)

order by [date], [time] ASC

Just changed the first date format as they like it to be this way.