Cafe Coffee Day — Added extra items on my bill

Address: Cafe Coffee Day, Plot no 7, Tubinakere Industrial Area, Right O Food Court, 571401

I recently visited Cafe Coffee Day outlet, where we ordered quite a few items. We paid the bill and went back and when we checked the bill later, we found out that the cashier had added extra addon chocolates worth 100 rupees twice in our bill even when we hadn't ordered it.
This is very unethical behavior on the part of CCD and is not at all acceptable