在JSON数组中查找新元素并更新电子表格

Question

我每天都在将我的JSON列表解析为Excel电子表格。它是一个大约400-500个用户信息的列表，每天都在更新。现在因为我不想每天解析相同的列表，我只需要找到添加到JSON中的新对象，并将其与Excel中现有的解析列表进行比较。如果找不到，将添加新对象。这是我的代码：

Private Sub populate_Click()

Dim http As Object, JSON As Object, Item As Variant
Dim i As Integer

Set http = CreateObject("MSXML2.XMLHTTP")
http.Open "GET", "http://controlpanel.verio/rest/reports?errorMessages=null", False
http.send

Dim jsnStr As Object
Set jsnStr = ParseJson(http.responseText)
'Fetching data
i = 3
For Each Item In jsnStr("results")(1)("results")

    Dim findy As Variant
    findy = Item(4)
    Columns("B:B").Select
    Set cell = Selection.Find(What:=findy, After:=ActiveCell, LookIn:=xlFormulas, _
    LookAt:=xlWhole, SearchOrder:=xlByRows, SearchDirection:=xlNext)

    If cell Is Nothing Then
    'do it something
    Sheets(1).Cells(i, 1).Value = Item(3)
   Sheets(1).Cells(i, 2).Value = Item(4)
   Sheets(1).Cells(i, 5).Value = Item(18)
   Sheets(1).Cells(i, 6).Value = Item(6)
   Sheets(1).Cells(i, 7).Value = Item(7)
   Sheets(1).Cells(i, 8).Value = Item(8)
   Sheets(1).Cells(i, 9).Value = Item(5)
   Sheets(1).Cells(i, 11).Value = Item(20)

    i = i + 1
    Else
    'do it another thing
    End If

Next
Set JSON = Nothing
Set http = Nothing

End Sub

我没有收到任何错误，但没有从excel列表中更改或更新任何内容。

我应该在下面的代码中更正哪些内容？