My processReciept callback function does not seem to be working properly and I cant figure out why?

game:GetService("MarketplaceService").ProcessReceipt = function(Purchase)
    local plr_Is, key = false, ("user:"..Purchase.PlayerId);
    local function Coin_Update(prd_Id, plr)
        local info = game:GetService("MarketplaceService"):GetProductInfo(
            prd_Id, Enum.InfoType.Product);
        local amt = info.PriceInRobux * 5;
        local c_v = Coins:GetAsync(key);
        c_v = c_v + amt;
        Coins:SetAsync(key, c_v);
        plr:FindFirstChild("leaderstats"
            ):FindFirstChild("RUN coins").Value = c_v;
        ui:FireClient(plr, {act = "C_add", amt = amt});
        plr_Is = true;
    end
    for i,v in pairs(game.Players:GetChildren()) do
        if v.UserId == Purchase.PlayerId then
            Coin_Update(Purchase.ProductId, v);
        end
    end
    if plr_Is == true then
        local info = game:GetService("MarketplaceService"):GetProductInfo(
            Purchase.ProductId, Enum.InfoType.Product);
        local Purchase_Con = {
            Purchase_Date = GetDate(),
            Purchase_Time = os.time(),
            Purchase_Product_Id = Purchase.ProductId,
            Purchase_Id = Purchase.PurchaseId,
            Product_Cost = info.price,
            Amount_Spent = Purchase.CurrencySpent
        }
        local history = Purchase_History:GetAsync(key);
        table.insert(history, Purchase_Con);
        Purchase_History:SetAsync(key, history);
    end
    return Enum.ProductPurchaseDecision.PurchaseGranted;
end

I have created the following process receipt function in my game, and I have tested it three times now. However every time I spend 20 robux on the product, My main account does not receive any robux. I returned Enum.ProductPurchaseDecision.PurchaseGranted, however my account that owns the game still does not receive any robux. Am I placing the return statement in the wrong place? or does the robux take a long time to load? I would appreciate any help. Thanks