Fatal error: Uncaught Error: Call to undefined function

how to fix below error

Fatal error: Uncaught Error: Call to undefined function topdeal_options() in /home/u380733166/domains/books.lk/public_html/wp-content/plugins/sw_woocommerce/includes/sw-woocommerce-shortcodes.php:960 Stack trace:?#0?/home/u380733166/domains/books.lk/public_html/wp-includes/class-wp-hook.php(310): topdeal_buton()?#1?/home/u380733166/domains/books.lk/public_html/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(NULL, Array)?#2?/home/u380733166/domains/books.lk/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)?#3?/home/u380733166/domains/books.lk/public_html/wp-includes/general-template.php(3069): do_action(‘wp_footer’)?#4?/home/u380733166/domains/books.lk/public_html/wp-includes/template-canvas.php(25): wp_footer()?#5?/home/u380733166/domains/books.lk/public_html/wp-includes/template-loader.php(106): include(‘/home/u38073316…’)?#6?/home/u380733166/domains/books.lk/public_html/wp-blog-header.php(19): require_once(‘/home/u38073316…’)?#7?/home/u380733166/domains/books.lk/public_html/index.php(17 in /home/u380733166/domains/books.lk/public_html/wp-content/plugins/sw_woocommerce/includes/sw-woocommerce-shortcodes.php on line 960