PROBLEM WITH MY CIYASHOP BANNER? (envato market)

hello everybody
A 6 month’s ago a programmer worked on my site and he used ciyashop theme by envato market.

The banners he made for me are great but i just trying to change a few things about them, but when i do so and im trying to click the “save changes” buttom nothing happens, and it stays the same.
I tried to make a banner of my own and the same happened , its like im clicking the button and its not doing anything.

I need your help as soon as possible , i need to change those banners fast.

thanks in advance, good day.

The page I need help with: [log in to see the link]