Struggling on Timed ban. Plz Help?

Im kinda struggling on making a timed ban. I dont know where to start.

Here is the script so far.

local ds = game:GetService('DataStoreService')
local tempData = ds:GetDataStore('tempData')

local dev = {'CRAZYQUACKY84'}

local function PlayerArgument(args)
	for index , person in ipairs(plrManager:GetPlayers()) do
		if string.match(person.Name:sub(1,args:len()),args) then
			return person
		else
			warn("Player not found!")
		end
	end
end


local function RemainingTime(x)
	local plrBanTime = tempData(plrBanTime)
	
	x = plrBanTime - os.time()
	
	return x
end

game.Players.PlayerAdded:Connect(function(plr)
	for _,v in pairs(tempData) do
		if plr.Name == v then
			local plrBanTime = tempData(plrBanTime)
			if plrBanTime ~= 0 then
				plr:Kick('Remaining time'..RemainingTime)
			else if plrBanTime == 0 then
					local UserId = plr.Id
					tempData:Remove(UserId, plrBanTime)
				end
			end
		end
	end
end)

game.Players.PlayerAdded:Connect(function(plr, banmsg)
	if string.lower(banmsg:sub(1, 9)) == ':bantime3' then
		local commandSplits = string.split(banmsg:sub(10,-1),' ')
		local plrBanArg = PlayerArgument(commandSplits[1])
		local commandReason = banmsg:sub((11 + commandSplits[1]:len()),-1)
		local plrBanTime = 
		
		local UserId = plr.Id
		
		plrBanArg:Kick('You have been banned for 3 days for Violating Terms of Service \n Enforcer: \n Reason: '..commandReaon)
		
		pcall(function()
			tempData:SetAsync(tostring(UserId), plrBanTime, commandReason)
		end)
		tempData:SetAsync(tostring(UserId), plrBanTime, commandReason)
	end
end)