I used the WooCommerce Smart COD PRO pluggin to add extra fee for COD and while it work, if I select COD(Αντικαταβολή-check pic1a) and right after that I select the first shipping method which is local pickup (Παραλαβή από το κατάστημα) the extra fee stays and is added to total amount. I believe it has something to do with the theme. Keep in mind that the site is live.
Thank you.
Thank you so much for contacting our support center.
To better assist you, could you kindly test the functionality with default WordPress themes such as TwentyTwenty or WooCommerce Storefront? This will help us determine whether the issue stems from our theme or elsewhere.