Pantaloons Fashion & Retail — such awful experience, no one at the store told us for 'no exchange' and now not giving us exchange

We visited pantaloons store at rajarampuri kolhapur yesterday. From the staff to counter person, no one told us that they aren't allowing exchanges. I asked the staff if i can try clothes, she said trial rooms aren't open.
So we thought okay, we will try after going home. I tried and i want the tops one size bigger. We went to store and they said that they tell every customer about it.
In fact there's no board as to 'no exchange' kept at counter (At least not there till today). They were very rude. Both me and my husband went there from 8 kms far just to exchange my clothes during our office time today so we don't do late.
But the awful experience is what we got.
Get us the exchange now, because it's store's mistake. No one told us. Check the camera footage and then talk to us.