Amul / Gcmmf — piece of balloon in amul dahi

Address:

Ahmedabad, Gujarat, 382424

I am a mother of 2 kids and generally give rs 10 amul dahi in tiffin along with my food. Today 4th oct 2017 i purchased 1 pack of amul dahi of rs 10 from my near shop in the morning around 8:30am along with my regular amul shakti milk packets. I kept the amul dahi pack in my son's (Age 2.7 years) tiffiin, he goes to playgroup in hopscotch school located at motera, ahmedabad.in the afternoon at 12:45 pm when i went to pick him up, i was informed by her class teacher that when she opened the amul dahi pack, after 2-3 sons of feeding him they saw a purple colour thing in the dahi. When taken out from the teachers hands and observed closely it was looking like a peice of balloon. As they found this not suitable and can be harmful for a kid of 2.7 years, they didn't make him eat that dahi.
I would request you to please attend this complaint. If required teachers and i have taken photos of the dahi pack.