DS(6)' New year one teacher stared this half term, so has only been his teacher for the last two weeks.
DS is called Ulrick, it's a family name & because my Dad & Grandad go by nicknames, we've never shortened his name, he's always just gone by his full name.
First day of the new term, he complained that the new teacher kept calling him Rick & he doesn't like it as its his Grandads name. I told him to just tell her to stop & use his full name.
The next day he complained again but that this time he told her but she still kept calling him Rick and by the end of the 2nd week he was getting rather upset over it as the kids in his class had started calling him Rick & he really hates it, so at drop off last Monday I told her he'd prefer to be called Ulrick & she said "thanks for letting me know" so I assumed she'd start calling him by his full name.
Then that same evening DS complained about her still calling him Rick & I promised to have another word with her. I managed to speak to her at pick up on Wednesday & was pretty clear that calling him Rick upset him & could she use his full name. She seemed sorry to have upset him & said she would use his full name from now on.
Thursday the school was being used as a polling station & then Friday was a teacher training day, so no school until today. I got home from work & DS was upset as I'd promised his teacher wouldn't call him Rick anymore but she had 
I don't know if she's just forgotten but I've mentioned it more then once now & DS has said that he's told her he doesn't like being called Rick multiple times
He was really upset by it & if it was just the teacher calling him Rick I might have just ignored it as she's only his teacher for a few more weeks but now kids in class have started calling him Rick & it really does bother him.
I don't really know what to do, would it be an overreaction to ask for a meeting? I've already told her he doesn't like her shortening his name, she's agreed not to do it but still does it. 