With over 7 years of experience in WordPress and PHP development, I am confident that I can address the issues you're experiencing with your WooCommerce platform. I have a deep understanding of WooCommerce and its functionalities, and I'm comfortable working with PHP, Javascript, and WordPress to provide clever and efficient solutions.
With regard to Problem 1, I've successfully resolved similar issues where toggles returned to default templates after page reloads. I can either implement a solution that prevents page reloads altogether or ensures that the toggle stays on "Monthly Plans" despite the page refresh.
Problem 2 regarding WooCommerce webhook is an area I am well-versed in. I will thoroughly examine your webhook setup, identify any issues impeding data transmission to your app's API, and swiftly resolve them. As for the future, even after completing the project, I am always open to helping clients like you with bug support and maintenance services to ensure thorough project completion & satisfaction. Please let me know how