I made friends with a school mum a few years ago when our DC were in nursery together. She subsequently got a job in the school and ended up working in the same class as DC.
Along with the class teacher, my friend made a harmless nickname for my DC based on a personality trait they have. At first laughed it off but after it then apparently replaced there actual name in class my DC expressed that they didn't like the nickname and told them to stop calling them the nickname.
This lasted all school year and my child got really angry and upset by it. I told my friend this and to stop calling the nickname. She laughed it off and keeps calling DC it. She then teases DC about other things now knowing that DC doesn't like her. Such as if she knows we are going somewhere, holiday, day out etc she will tell DC that she is coming along too. DC is only 5 so doesn't get that she is 'joking' and has been upset that this person is coming on their day out.
I've told her seriously to stop but she doesn't. Now DC is not in her class I thought it would stop but she does it in the corridors etc. She also tries to hug him knowing full well he doesn't like it and is physically wriggling away and shouting stop. She just laughs.
I've completely distanced myself from her so we don't see her out of school at all but clearly she is still doing it in school. I spoke to another school mum about this whose DC has just joined her class and she is apparently doing the same. Gave the child a nickname and continues to call them it despite the child not liking it.
Where do I go from here?