It seems like you renamed the plugin to xBestitAmazonPay - you have to delete this folder from the plugin-folder of shopware. It should be /engine/Shopware/Plugins/Community/FrontendxBestitAmazonPay
It seems like you renamed the plugin to xBestitAmazonPay - you have to delete this folder from the plugin-folder of shopware. It should be /engine/Shopware/Plugins/Community/FrontendxBestitAmazonPay