Reliance Trends — Denied purchase

Address:

Amreli

I went to a store nearby in Amreli and I choose perfume for my wife.
I went to the pay counter they said you can't purchase only perfume, you have to purchase clothes, too.
I said there is nothing like that written anywhere here. They said we can't do that.

How can you deny a purchase to a consumer?
My contact number [protected]