G935F Venezuela HELP!!

Good morning to all of you bros i want some to be helped here my phone was in 7.0 i purchase it used so the phone was having a patch cert and i dont know that so i take the phone and i updated to 8.0 bit 3 and my patch gone i dont have any money here to fix my phone or to purchase a box im in Venezuela can someone kindly to be helped me remotly to patch my cert? kindly kindly kindly