Style.css edits are not recognised by sites

Hi,

I am using photoway and have tried to make multiple changes to my style.css file, so that certain things can be reflected across the whole site (i.e. i want to change the font family across everything on the site).

I am able to upload my style.css through FTP, and see the updated file in my file manager, however none of the styling changes are reflected on my site.

This is definitely the correct css file to be using, as I deleted it and saw the expected lack of styling reflected on my site.

Please help I have tried everything! Really wanting to avoid using additional CSS panel for everything I change, as it is already getting bulky and it isn’t as stable or reliable as saving and updating actual files. Plus will be a pain to go page by page to make changes such as font!