*URGENT QUICK FIX NEEDED* Developer needed to fix a bug resulting from updating Wordpress Theme -- 2

I need this to be fix within 2 hrs . Please apply if you know wordpress . I website I manage was recently updated to PHP 7.2 and WP 5.1, in addition to a theme version update to accomodate these platform upgrades. The theme is the popular BETHEME from MUFFINGROUP (Themeforest-Envato) The above resulted in certain theme functionality (of the new Theme version on PHP 7.2), interface and content formatting not working anymore. I cannot seem to update many of the Betheme settings even after saving them the website remains the same e.g. I cannot change the font. Interface errors where many things are not displaying, header sticky menu not moving down, background colours like footer dissapeared, font reverting to some default font, many shortcodes not displaying etc. The update has been double checked and re-done, the hosting server settings have been checked to ensure they fit the Betheme requirements, plugins turned off and tested all to no avail. I suspect there are some configuration settings/css or other setting that is blocking a part of the theme processes. REQUIREMENTS: -I'm looking for a geunine skilled developer who *MUST* have direct experience working/debugging Wordpress themes. Who can fix the above bug specifically in some hours, previous experience with the Betheme/Muffingroup themes would be a big plus. -Wordpress configuration, plugins, PHP, HTML, JAVA skills and understanding how they effect wordpress themes output. -Wordpress migration and setup experience as I do NOT want to lose any of the current website content or structure, this above bug needs to be fixed BEST CANDIDATE WILL: -Experience with popular Wordpress themes like Betheme -A record of previous work