Increasing buttons overlap

Hi all,

Afer installed this plugin my increasing button appered but it is overlaped with the minus button,

i added to the functions.php

add_action( ‘wp_enqueue_scripts’, ‘wcs_dequeue_quantity’ );
function wcs_dequeue_quantity() {
wp_dequeue_style( ‘wcqi-css’ );
}

did not work for me,

can you tell me what i am doing wrong?

http://strollegant.com/shop/accent-2/

thank you in advance

v/r

https://wordpress.org/plugins/woocommerce-quantity-increment/