Script doesn't unequip Auras? (ANSWER PLEASE) (contains another question)

NOTE: I'm posting this question multiple times yet no one answers it. ANSWER IT NOW.

So I'm making a game with a shop that you can buy Auras, This script gives you the aura when you buy it, but it doesn't let you unequip an Aura. Someone help me?

Also does this script buys the thing multiple times even though it is supposed to buy it a single time and let you equip and unequip, if true then help me. Here's the local script:

local player = game.Players.LocalPlayer or game.Players.Players.PlayerAdded:wait()
local char = player.character or player.Character or player.CharacterAdded:Wait()
local auraEventBlue = game.ReplicatedStorage.AuraEventBlue
local variable = false
local PurchaseMeter = true

script.Parent.MouseButton1Down:Connect(function()
	for i,v in pairs(game.Players:GetPlayers()) do
        if v:FindFirstChild("leaderstats") then
	if v.leaderstats.Credits.Value >= 35 then
		if PurchaseMeter == true then
		end
        v.leaderstats.Credits.Value = v.leaderstats.Credits.Value - 35
        PurchaseMeter = false

 if not variable then
  variable = true
  auraEventBlue:FireServer(char)
  script.Parent.Text = "Disable"
 else
  variable = false
  char.HumanoidRootPart.BlueEffect:Destroy()
  script.Parent.Text = "Enable"
 end
end
end
end
end)