You don't borrow money and not pay back. Polina loves money and she'll take everything you have, your card with PIN and she's make your accounts dry. You've been an asshole and you deserve nothing else in her eyes. Maybe you deserve one more thing - to be made to worship her bare feet, suck her toes and lick her soles as the little bitch she'll make you right now. So get down to her feet, submit to her, give her all your money and get humiliated or she will beat you up and take it all anyway.