DS4 started reception with no issues and knew half the class already from nursery. At nursery he would always come home talking about his friends.
Since starting school he has not mentioned any of the old friends. He began telling me most days he was spending his breaks alone, but didn't seem too bothered. This seemed odd, I raised it with teacher, she paid attention, buddied him up etc.
Today we went to a class party and I saw with my own eyes he was bullied by a group of old nursery friends throughout. Physically and verbally, completely unprovoked. He later confirmed they speak to him the same way in school ("I hate you, you're stupid"). He had never mentioned this before. There is no reason for this that I can see.
How to handle this, is it back to the school, or do I approach the parents without losing my shit? How do kids get back on track from this horrible treatment so young?