Swiggy — packing charge

I made an order from swiggy and i was charged for the paper carry bag and as much i know carry bag with the orders cannot be charged and if that's there policy they should have asked me whether to add the carry bag or not with the order. They charged me 9₹ for the paper carry bag without any right.
I raised the complaint to the swiggy executive and there response was that they cannot help me about the same as they clearly saying everything is decided by the restaurant how much to charge and for what. And as i ordered from the swiggy app it's there duty to contact the restaurant and warn them and cancel the charge i had beared for a paper carry bag