I have bad vaginal ithing and now i am using cocoa butter cream so can i use it or does it case for bad infection?

This cream will not help vaginal itching and might make it worse. Probably the most common cause of vaginal itching is yeast infection, and cocoa butter could make yeasts grow and cause more symptoms. Try one of the many over-the-counter creams or inserts for vaginal yeast (look for active ingredient ending in "azole", like miconazole, terconazole, etc. See a doctor if it doesn't help.