Pizza Hut India — Mis behavior of staff at outlet when inquired about the wrong bill details

I had visited pizza hut outlet mangalam tower gorakhpur. We orders a medium pizza and 3 lemenoids. When i checked the bill letter they had charged 6 - 7 ups which costs more when i asked them they said sir it costs same but actually it costs more. They also said tried to mislead me with some tax things but as i know a little about the details they told me to go and learn about it and he said that go and file a complain we will not entertain you.