Below is the code for simple IE automation which simply inputs order number like 1413105088 and postal code which is always 78759 and clicks on submit button and then from the result page it gets the tracking number like 017136295201034
and puts them in column C.
It works as expected but as IE is not so reliable and slow I was wondering if there is a faster way to do this process and if not can I make it atleast reliable so that it doesn't fails after click on the submit button, meaning the
   Do While IE.Busy Or IE.ReadyState <> 4
        DoEvents
    Loop
after
        .document.getElementsByClassName("button_text")(3).Click
fails as it doesn't really checks if the ie page has finished loading.
I am asking this as I have to do this for 100s of such request. Thanks in advance.
Full code:
Sub test()
Dim urL As String, orderNum As String
Dim trackingNum, prodDetail, cet
Dim i As Long, fI As Long
Dim IE
urL = "https://fisher-price.mattel.com/webapp/wcs/stores/servlet/OrderStatusGuestView?catalogId=10101&langId=-1&storeId=10151&krypto=prThs8zyeWG0bkF9ajSr%2FCnzmv1TKodtTEw0EdXtC7NjEmfD3cb6Z75umdkcXCiEPFxvkd0TfHkOswm3ZcMp8sbrU2doZFa6TxVbI%2BW1Lzk%3D"
fI = MAIN.Range("B" & Rows.Count).End(xlUp).Row
Set IE = CreateObject("InternetExplorer.Application")
With IE
    .Visible = True
For i = 2 To fI
    orderNum = Trim(MAIN.Range("B" & i).Value)        'Sample ordernum = 1413105088
    If orderNum <> "" Then
        .navigate urL
        Do While IE.Busy Or IE.ReadyState <> 4
            DoEvents
        Loop
        .document.getelementbyid("orderNumber").Value = orderNum
        .document.getelementbyid("postalCode").Value = 78759
        .document.getElementsByClassName("button_text")(3).Click
        Application.Wait Now + TimeValue("00:00:02")
        Do While IE.Busy Or IE.ReadyState <> 4
            DoEvents
        Loop
        prodDetail = .document.getElementsByClassName("productDetails")(0).innerText
        If InStr(prodDetail, "Tracking :") > 0 Then
            cet = Split(prodDetail, "Tracking :")
            trackingNum = Trim(cet(1))
            MAIN.Range("C" & i).Value = trackingNum
        Else
            MAIN.Range("C" & i).Value = "N/A"
        End If
    End If
Next i
End With
IE.Quit
Set IE = Nothing
End Sub