Plugin doesnt allow changing width of facebook page plugin

Hey,

I use the popup to show the new facebook page plugin for showing my facebookj page.
Somehow the plugin doesnt allow the width to change..
I even use the “!important” code in css and it even worked the first time I used it, but after I tried something else and went back even the !important code didnt work anymore.

Does anyone of you guys have an idea whats wrong there?

Wasted so much hours on this problem. I dont know what I should do..
Thank you so much!

https://ww.wp.xz.cn/plugins/wbounce/