Customize the thank you page or "order-received" page of woocommerce for onlinerakhi.com

(I have a budget of maximum $50 for this work.) Hi, I have an e-commerce website - [login to view URL] It is a wordpress website. It uses woocommerce for e-commerce functionality and ccavenue as the payment gateway services provider. Currently, when I receive any successful order or failed order, it redirects user to the "order-received" page but with the same message that your order has been received. This happens even when I cancel the transaction. I want this page to be customized based on the status of order. Also show various options/ buttons to the user like - Upon successful order: - A message telling customer about the successful order and thanking them for ordering. - Show the order details to the customer, pretty much what is visible when he clicks on an order's 'View' button on orders section of my-account page. - Button using which the customer can shop again. Like 'Continue shopping'. - Button using which the customer can navigate to the orders section of My-account page to print Invoice (If logged in). Basically it should point to '[login to view URL]' Upon failed order: - A message telling the customer about the failed order and the reason for failure. - Show them a button to go to cart so that they can checkout again. - Show them a button to go to the account page (if logged in) so that they can directly pay from there. Important this is that I do not want to change the woocommerce template or core files (because they cause problems when updating). NOTE: I don't have any test environment for this website. I just have the production environment. (I have a budget of $50 for this work.)