What is wrong with my @Name Command?

Im making an Admin script And I want to be able to Name the Players, any Help?

function Name(plr,text,time,par,Texttype)
plr.Name.Text=text
wait(time)
end
if msg:lower()=="@m"then
	Text("BlahBlahking230",4,plr,"Name")
end

if msg:lower():sub(1,3)=="@Name "then
	Text(plr.Name..": "..msg:sub(4),4,workspace,plr,("Name"))
end

The entire script is

Replicants = {"amegaman"}

function Text(text,time,par,Texttype)
local m=Instance.new(Texttype)
m.Parent=par
m.Text=text
wait(time)
if m~=nil then
m:Destroy()
end
end

game.Players.PlayerAdded:connect(function(plr)
for i,v in pairs(Replicants)do
if plr.Name:lower()==v:lower()then
plr.Chatted:connect(function(msg)

if msg:lower()=="@m"then
Text("This is a message!",4,workspace,"Message")
end

if msg:lower():sub(1,3)=="@m/"then
Text(plr.Name..": "..msg:sub(4),4,workspace,"Message")
end

function Name(plr,text,time,par,Texttype)
plr.Name.Text=text
wait(time)
end
if msg:lower()=="@m"then
	Text("BlahBlahking230",4,plr,"Name")
end

if msg:lower():sub(1,3)=="@Name "then
	Text(plr.Name..": "..msg:sub(4),4,workspace,plr,("Name"))
end
end)
end
end
end)

There is No error, but It Doesn't Work.

You should probably put the Variables you used somewhere in the code. (I only put this in an answer because for some reason I can't comment.)