sql - Ignore records between last thursday and this thursday not working -

i working on stored proceedure user passes in payment type simple web application return payment types.

for credit card payments want ignore records fall between thursday of last week , thursday of week.

i have written this:

select dateadd(day, (datediff (day, 4, getdate()) / 7) * 7, 3)  select convert(datetime, convert(nvarchar(20), dateadd(day, 4 - datepart(dw, getdate()), getdate()), 103)) 

which finds out thursday of last week , thursday of week.

however when use in stored proc still returns records between dates.

this section of stored proc used

else if @paymenttype = 'credit card' begin     select distinct [variable]        ,[variable]       ,[variable]       ,[variable]       ,[duedate]       ,[variable]       ,[variable]       ,[variable]       ,[variable]       ,[variable]       ,[variable]       ,[variable]     mytable      paymentmethod = 'credit card' ,             [duedate] not between dateadd(day, (datediff (day, 4, getdate()) / 7) * 7, 3) ,            convert(datetime, convert(nvarchar(20), dateadd(day, 4 - datepart(dw, getdate()), getdate()), 103))     order duedate desc    end 

this screenshot of of data (cant show more due data protection)

for way want work shouldn't returning these records (they wednesday of current week want ignore)

i cant figure out why returning these appriciated

just update, after tinkering convert part creating issue removed , works

where  paymentmethod = 'credit card'             , [duedate] not between dateadd(day, (datediff (day, 4, getdate()) / 7) * 7, 3) ,            dateadd(day, 4 - datepart(dw, getdate()), getdate())     order duedate desc    

not sure why put convert part in there