Hello, @Mody,
Thanks for using our Theme and for contacting us.
1- Regarding the slider issue I have added a custom CSS code in the theme options >> theme custom CSS >> global >> check the image: https://postimg.cc/TpjhbkM0 by doing this your issue was resolved. check the resulting image: https://postimg.cc/Yvh9PtLn
2- The product image appears fine already there is no issue. check the resulting image here: https://postimg.cc/N2DM3MxV
I have checked your site on my personal mobile phone and found no issue. header, menu, images, sections, rows, and layouts appear just fine. Here is the video for a better reference: https://streamable.com/4ubeb6
Regards 8Themes Team.