My site is getting destroyed as the days go by

I have a plugin called Dokan and a theme called Avada and they are having a bit of relationship trouble.

My site is turning into a disaster thanks to Dokan's support staff with language barriers. They try to help but only make things worse. Can someone help figure out what is going on?

I was having issues with the sidebar on this page: http://puregoldfish.com/store/finned-friends/

They fixed that. But then over the course of several days fixing that caused these problems:

- Sidebar on blog page (http://puregoldfish.com/blog) & blog posts is at the BOTTOM of the page instead of the right side
- Sidebar on store page (http://puregoldfish.com/store/) is having the page content over the top of it

Now for the biggest issue of them all...

They also messed something up big time so now my custom CSS is not being applied to the website (Dashboard -> Appearance -> Theme Options -> Custom CSS)

For example notice that my Subscribe button on the home page & blog sidebar appears unstyled though it clearly is.

I can give FTP access, Support access, whatever. Just please help get this under control.

Thanksies! =)