Group rank over head if not in group?

So i made a script that shows the rank of the player in a specified group. The group rank part works but the problem is - everyone who is not in the group doesnt have a rank over their heads. I wanted to make it so the rank said "customer" if they were not in the group. Here is my script (you can scroll down to the not in group part)

groupid = 3309505 --Change this to your group ID.

game.Players.PlayerAdded:connect(onPlayerRespawned)--(Do not chang)--
function onPlayerRespawned(newPlayer)
	wait(1)
	if newPlayer:IsInGroup(groupid) then
		gui=Instance.new("BillboardGui")
		gui.Parent=newPlayer.Character.Head
		gui.Adornee=newPlayer.Character.Head
		gui.Size=UDim2.new(3,0,1.25,0)
		gui.StudsOffset=Vector3.new(0,3,0)
		texta=Instance.new("TextBox")
		texta.Size=UDim2.new(1,0,1,0)
		texta.BackgroundTransparency = 1
		texta.TextScaled = true
		texta.TextColor3 = Color3.new(255, 255, 255)
		texta.Text = ("- " .. newPlayer:GetRoleInGroup(groupid) .. " -")
		texta.Parent=gui
		w = game.Lighting.WepsGroup:GetChildren()
		for i = 1,#w do
			w[i]:Clone().Parent = newPlayer.Backpack

--this is the part where i tried to script the "customer part"

				if newPlayer:IsNotInGroup(groupid) then
		gui=Instance.new("BillboardGui")
		gui.Parent=newPlayer.Character.Head
		gui.Adornee=newPlayer.Character.Head
		gui.Size=UDim2.new(3,0,1.25,0)
		gui.StudsOffset=Vector3.new(0,3,0)
		texta=Instance.new("TextBox")
		texta.Size=UDim2.new(1,0,1,0)
		texta.BackgroundTransparency = 1
		texta.TextScaled = true
		texta.TextColor3 = Color3.new(255, 255, 255)
		texta.Text = ("Customer")
		texta.Parent=gui
		w = game.Lighting.WepsGroup:GetChildren()
		for i = 1,#w do
			w[i]:Clone().Parent = newPlayer.Backpack
		end
	end
end

function onPlayerEntered(newPlayer)
	newPlayer.Changed:connect(function (property)
		if (property == "Character") then
			onPlayerRespawned(newPlayer)
		end
	end)
end

game.Players.PlayerAdded:connect(onPlayerEntered)

You could put the following at the end of the first function.

if not newPlayer:IsInGroup(groupid) then
gui:Destroy()
end