Adapt a specific part of a wordpress template

I require someone to help me to adapt a PHP file to be able to work with a WordPress Image resizing script called 'aqua-resizer'. Essentially I have installed the 'Tagdiv Newsmag' theme on my website, but I prefer to use 'aqua-resizer' to produce image thumbnails which are the ideal size and cropped. The theme uses a pagebuilder, and through the use of modules it's straightforward to adapt each page. But the theme's PHP code needs to be adapted to work with 'aqua-resizer' - and I've run into issues getting this to work, as my PHP knowledge is fairly limited. The attached files may help - the theme currently uses the get_image code, which is from the function get_image (lines 197-306) of td_module.php. My guess is that a function needs to be written to then work with the 'aqua-resizer' code '[login to view URL]'. In all, I'm not expecting much more than 100-200 lines of extra code, maximum.