diff --git a/src/handlers/userHandlers/userProductHandler.js b/src/handlers/userHandlers/userProductHandler.js
index c068c28..0b940eb 100644
--- a/src/handlers/userHandlers/userProductHandler.js
+++ b/src/handlers/userHandlers/userProductHandler.js
@@ -539,6 +539,22 @@ export default class UserProductHandler {
             // Получение баланса пользователя
             const userBalance = await UserService.getUserBalance(user.id);
     
+            // Проверка баланса пользователя
+            if (userBalance <= 0) {
+                await bot.sendMessage(
+                    chatId,
+                    `❌ Insufficient balance. Your current balance is $${userBalance}. You need $${totalPrice} to complete this purchase.`,
+                    {
+                        reply_markup: {
+                            inline_keyboard: [[
+                                { text: '💰 Top Up Balance', callback_data: 'top_up_wallet' }
+                            ]]
+                        }
+                    }
+                );
+                return;
+            }
+    
             if (userBalance < totalPrice) {
                 await bot.sendMessage(
                     chatId,
diff --git a/src/services/userService.js b/src/services/userService.js
index 2541724..3e12c09 100644
--- a/src/services/userService.js
+++ b/src/services/userService.js
@@ -51,31 +51,23 @@ class UserService {
     static async createUser(userData) {
         try {
             const existingUser = await this.getUserByTelegramId(userData?.telegram_id);
-
+    
             if (existingUser) {
                 return existingUser.id;
             }
-
+    
             const fields = Object.keys(userData);
-            const values = [];
-
-            for (const field of fields) {
-                values.push(userData[field]);
-            }
-
-            const marks = [];
-            for (let i = 0; i < fields.length; i++) {
-                marks.push("?");
-            }
-
-            const query = [
-                `INSERT INTO users (${fields.join(', ')})`,
-                `VALUES (${marks.join(', ')})`
-            ].join("");
-
+            const marks = Array(fields.length).fill('?');
+    
+            const query = `
+                INSERT INTO users (${fields.join(', ')})
+                VALUES (${marks.join(', ')})
+            `;
+    
             await db.runAsync('BEGIN TRANSACTION');
-            const result = await db.runAsync(query, [values]);
+            const result = await db.runAsync(query, Object.values(userData));
             await db.runAsync('COMMIT');
+    
             return result.lastID;
         } catch (error) {
             await db.runAsync('ROLLBACK');