Help me to fix with my woocommerce app bugs

Our woocommerce app is develop in ionic and we have few bugs to need be fixed ASAP. Bugs and Performance: 1. When we make a product Search or look by category the app shut down the database or put our production server down. Also we need optimized the app performance. 2. Fix payments Payments - Credit card payeezy - Fondo disponible - Fix bugs with cash on delivery (delete the url of product image) on email order details - Make sure our COP currency is converted to USD to be supported by paypal and credit card gateways Note: make sure all our payments methods work fine on ios and android, currently the payment provide errors but transaction goes through. 3. Sign in / Sign up - Make sure old customers can sign in (this is not working properly on iOS) - Make sure new customers can sign up Note: make sure flow work on ios and android 4. Shipping - Make sure shipping rules in woocommerce display same as our website - Display all the countries we have setup to receive orders (currently only 1 country is showing) 5. Products - Variable products pricing and data is taking time to fetch the data 6. Product attibutes in categories - The app is showing inside the categories all the attributes, it should only display the attributes that belong to the products that are inside that specific category.