Five year old - behavior problems at school

HELP!! My 5 year old just started kindergarten this year and his behavior is slowly getting worse. He has some good days here and there but he doesn’t listen very well the the teacher and isn’t respectful. He knows what he is doing is wrong but I dont know how to fix his behavior at school! She will message me saying how his behavior isn’t getting better and it’s frustrating because we knows how to act! I’ve exhausted options on what to do. I’ve punished him at home, taking tv away making him say in his room etc ....and I’ve heard that you shouldn’t punish at home. I need help. Seriously any advice. Idk if I need to call and talk to the school counselor or what but it has so stop. I can’t have these kind of problems in kindergarten!! 😫😤