Killstreak tool not raising kills?

Anyway there was a problem that happened when making a killstreak tool

Basically I'm making a tool called: "Death Scythe" that does 20 damage, also If the scythe hits someone with 20 HP or below (I haven't added the feature that causes the event when the HP Is below 20 or something) the head will be deleted by the user, and gets a kill, which makes them stronger, the problem Is that It doesn't give kills when It kills a user

Damage script (Under the slash script):

local KillStreakGUI = script.Parent.Parent["Killstreak GUI"]
local GetKillReady = script.Parent.GetReadyForKill

Handle.Touched:Connect(function(hit)
	local humanoid = hit.Parent:FindFirstChild("Humanoid")
	if humanoid then
		humanoid:TakeDamage(20)
		if humanoid.Health == 20 then
			humanoid.Parent.Head:Destroy()
			KillStreakGUI.Value.Value = KillStreakGUI.Value.Value +1
			GetKillReady:FireClient()
		end
	end
end)

Local script (Get ready for getting a kill):

local GetKillEvent = script.Parent.Parent.GetKill
local GetKillReady = script.Parent.GetReadyForKill

GetKillReady.OnClientEvent:Connect(function()
	GetKillReady:FireServer()
end)

Add kill script (Server script):

local KillStreakGUI = script.Parent["Killstreak GUI"]
local GetKill = script.Parent.GetKill

GetKill.OnServerEvent:Connect(function()
	KillStreakGUI.TextLabel = KillStreakGUI.Value.Value +1
end)

Do you have a leaderstats? If you want a kills on it should look like this:

local Kills = Instance.new('IntValue', leaderstats)
	Kills.Name = 'Kills'
	Kills.Value = 0
	
	local Deaths = Instance.new('IntValue', leaderstats)
	Deaths.Name = 'Deaths'
	Deaths.Value = 0
	
	local Players = game.Players

	

	Players.PlayerAdded:Connect(function(player)
		wait(1)
		local Stats = leaderstats:Clone()
		Stats.Parent = player
		local Deaths = Stats.Deaths
		player.CharacterAdded:Connect(function(Character)
			Deaths.Value = Deaths.Value + 1
			local Humanoid = Character:FindFirstChild("Humanoid")
			if Humanoid then
				Humanoid.Died:connect(function()
					for i, Child in pairs(Humanoid:GetChildren()) do
						if Child:IsA("ObjectValue") and Child.Value and Child.Value:IsA("Player") then
							local Killer = Child.Value
							if Killer:FindFirstChild("leaderstats") and Killer.leaderstats:FindFirstChild "Kills" then
								local Kills = Killer.leaderstats.Kills
								Kills.Value = Kills.Value +1
							end
							return
						end
					end
				end)
			end
		end)
	end)

You don't have to add the deaths. Make sure you include the bottom part about kills. When the players head is off, the player should then die, so that it counts towards the kill on the leaderboard. Hope this helps!