Vishal Mega Mart — Carry bag related

Address:

Paonta sahib

Sir/madam,
I am from paonta sahib, H.P.
If i purchase from vishal mega mart, then cashier told me can you want carry bag, its paid rs. 18.
But i purchage only 3 small items, so i say plz give me a paper bag to these items.
But cashier say, there we have no permission for giving paper bag, only paying carry bag allowed.
My concern us that when we purchase items, carry bag should be provided without any cost.