Urgent Wordpress/Woocommerce Checkout Bug Fix for E-commerce Site

We are urgently seeking an experienced WordPress and WooCommerce developer to diagnose and resolve a critical checkout issue on our e-commerce website. Customers are experiencing intermittent payment failures, where transactions are authorized but the order process does not complete successfully, leading to abandoned carts and customer dissatisfaction. The primary goal of this project is to identify the root cause of these payment failures, implement a robust and reliable solution, and thoroughly test the checkout process to ensure it functions flawlessly across all major web browsers. We expect clear communication throughout the project and a concise summary of the implemented fix upon completion. This is a small, time-sensitive assignment, estimated to require approximately 1-2 hours of a skilled professional's time.