Main Listing Image Cropping

Hiya, hoping you can help, i have installed your plugin and working great so far (just playing around with it), but on a car listing page, the main image is off, there is a margin on the right if you look so the arrows are not central either, is there something i can do to fix this? I am not technical but have used inspect element to try and reduce the left margin, which i kinda did, but nothing working great cuz i don’t know what i’m doing, any help would be appreciated, thanks you… 🙂

URL: http://5propertyinvestors.co.uk/