Fatal Error after installing Theme Shoper Pro and needed Plugins

Christos Natsinas asked 4 months ago

yesterday I bought your Theme Shoper Pro and I installed it, after adding the latest recommended plugins We my Webshop is destroyed!!!! How can it happen hours of work to add my Products was gone!
If I use the adress, I get only:
Fatal error: Cannot declare class ATA_WC_Smart_Popup_Cart_Admin, because the name is already in use in /homepages/33/d19063985/htdocs/clickandbuilds/DerNoppenbotschafter/wp-content/plugins/woocommerce-modal-fly-cart-pro/inc/class-admin.php on line 8
That is all! Worst Product if I have to afraid to lost my hole work. I wish refund and compensation if there no way to recover my work and my Shop!!!!!