It could help, it could not. it could fix your site, it could probably also break it. use everything here with caution, some posts are complete, some are not and will just help direct you on the right path.
have a question? ask away.
- Disable Shipping Method Based on Total Cart Quantity (WooCommerce)
- Disable Shipping Method Based on Total Cart Weight (WooCommerce)
- Add Custom Fee to Specific Shipping Methods (WooCommerce)
- Prevent WooCommerce from Selecting Default Payment Method on Checkout
- WooCommerce Product Add On (functions.php) (no plugin)