Us Pizza — misbehaving staff

Address:

380013

I visited us pizza at naranpura, ahmedabad, gujarat for a parcel service where i was carrying a coupon code which i had already confirmed with the manager mr. Naveen patel that it will be validated.
When i showed them the coupon the manager started denying that this coupon is not valid here and when we asked him why he started abusing and behaving rudely.
I was accompanied by my elder sister and when she said that you already confirmed the coupon why are you denying he charged towards her to beat her up without any type of misbehavior from our end. We were continuously asking them for the reason and the manager ended up saying i am the decision maker here. He also added that my name is naveen patel and you can do whatever you want no one can even touch me here.
We were calmly trying to have a conversation but that guy was being aggressive and rude.

Request you to take strict action against the manager else i'll file a police complaint against mr. Naveen patel, restaurant manager at us pizza, naranpura, ahmedabad.