Do not go to the parent. Always deal with the school.
Contact the school before Christmas. Email the office, rather than individual members of staff, marking your message as for the attention of the headteacher and class teacher - someone will be monitoring emails and staff may be in work early next week.
Ask that the headteacher investigates and gets back to you with regard to how they are going to ensure that your daughter is safe from further similar incidents in school. Don’t ask about the other child or request specific punishments etc.
If you don’t hear back by first day of next term, make an appointment to speak to the headteacher. If you get nowhere with that then get a copy of the school complaints procedure and follow the steps in that, in the order they are given.
If you become aware that other children have had similar, their parents should follow the same process but separate from you. Two or more complaints carries more weight that one with lots of other parents and their involvement distracts from your primary focus, your daughter.
It doesn't excuse the behaviour, but a child that seeks to remove from others what they don’t have themselves, ie happiness and friendship, needs help themselves, and the school is best placed to deal with that.