The scammers using the persona 'Oksana Belousova' are now using the email address firstname.lastname@example.org.
Never send money to somebody you only know from email, or chat!
Western Union and Moneygram are the favored modes of collecting money by scammers. Don't use them!
There are many 'Russian' romance scammers on chat, and dating sites. You are not in touch with the pretty person in the pictures! Do NOT send money!