You're using a really old version of the view. No wonder that code didn't work.
The easiest will be to create a file templates/YOUR_TEMPLATE/html/hikashop_button.php and put the line of code below in it :
<?php function hikashop_quantity_render($html,$i,$max_quantity,$min_quantity){ return $html; }
It depends how the order was confirmed. If you confirmed the order manually, then, if you had the notification option to on an email was sent.
If the order was automatically confirmed by the payment plugin, then, an email was sent as well.
