font change

I have been trying to fix on my own the font issue, it is currently on Fira Sans Condensed, however all post content and widget and some other page come as script fonts, please could you help me on how do I fix this, this is my second request for the same issue, it was not answered back, by the way I have check each one of the typography font in customize – appearance and still does not work they are all on same font, but when browsing post have different font. I appreciate your consideration. Thank you