Stop a Macro if Criteria not met and Show Error Message

[m3hool]

Hello!

I'm fairly new to VBA and have a question, something probably quite simple to fix

I am trying to work a simple Macro which looks at the item selected on a dropdown (through data validation) for acceptance of Terms and Conditions. If agreed, I want to unhide another tab, if disagree selected, then an error message should be shown and the tab should not be unhidden.

I have managed to get the error message for disagree, however it still unhides the tab any advice here will be greatly appreciated.

Private Sub Worksheet_Change(ByVal Target As Range)
    
    
    If (Range("B29") = "Agree") Then

Sub unhide()

'
' unhide Macro
'

'
    Sheets("Pricing Conditions").Select
    Sheets("Pricing Template").Visible = True
    Range("E17").Select

If (Range("B29") <> "Agree") Then


Errormsg:
    MsgBox "Please Read Conditions and Agree"

Exit Sub

End If
End Sub

Many thanks,
Mez