How to make a buy model script work?

Okay so I have been trying to make this car model I have made work as a buy able model to get for real money. The car is called the Tesla, my only problem is when I buy the model it spawns broken and out of shape. please help. Here is the script:

-------------------------------------------------------------------------------------------------------------------------

model = script.Parent.Parent.Parent.Tesla --Item name
Upgradecost = 1000  --Change cost to upgrade
------------------------------------------------------------------------------------------------------------------------- 

upgradeStuff = model:clone(Upgrader1)--


model:remove() --remove the ingame model. We saved a clone for later.

local ting = 0 --debouncer

function onTouched(hit)
    if ting == 0 then --check for debounce
    ting = 1 --activate debounce 
    check = hit.Parent:FindFirstChild("Humanoid") --try to find the human that touched the button

    if check ~= nil then --if toucher is a human then to following
        local user = game.Players:GetPlayerFromCharacter(hit.Parent) --get player from touching human
        local stats = user:findFirstChild("leaderstats") --Find moneyholder

        if stats ~= nil then --If moneyholder exists then
            local cash = stats:findFirstChild("Money") --Get money
            if cash.Value > (Upgradecost-1) then --If there is enough money then

                cash.Value = cash.Value - Upgradecost --remove cash
                upgradeStuff.Parent = script.Parent.Parent.Parent --put the upgrade into the game
                script.Parent.Parent:remove() -- remove the upgrade button (in case of one-upgrade only)

            end
        end
    end

    ting = 0 --remove debounce
    end
end

script.Parent.Touched:connect(onTouched) --start checking for touchers

Here are the links for proof:

C:\Users\Solrac\Documents\ROBLOX\Game Stuff\Astura with buy model button at start.png

C:\Users\Solrac\Documents\ROBLOX\Game Stuff\Astura afterwards (after bought using money).PNG