Liberty Shoes Limited — coolers suspicious price and packing

Address:

4/153, Vishal Khand 4, Gomti Nagar.LUCKNOW,Uttar Pradesh, Lucknow, Uttar Pradesh, 226010

I bought a Pair of Coolers from your Patrakarpuram Lucknow outlet.
Receipt number 1827 Dt 20 June 2019.
There was a problem & next morning i returned and instead bought Coolers Cat E278-01. They charged Rs 300/- extra for which they gave a receipt but no bill. The Box of Coolers shows date of Manufacture as April 2017.
I find this suspicious.Pl reply as to my misgivings as I am a very old customer.
In short
1.Issue new bill
2.is it normal for Slip on Coolers to be 2 years 2 Months Old