Colleague hates me now. What do I do?

She is out of order and your management should speak to her about her unhelpful attitude,childish behaviour and unprofessional actions,you were selected for the job so show your management ability and if you have to tell her of be mature about the situation,or let her rant on and dig a hole for herself while you smile and be understanding and a credit to you managerial talents,use you head your feet are for dancing.