Pai International Electronics — I'm complaining about offer

Address:

Near Narayana junior college, benz circle, vijaywada, andhra pradesh, India.

I bought a laptop on 15/01/2022 in pai international near benz Circle, vijayawada, Andhrapradesh. The price of it is 52000 and they said a laptop will be provided, but it's online lenovo official website price is 49000 . I asked for the online they said ok and i paid money too. Then after they said that if I buy it for 52000 then only I will bag.
In the receipt also printed that laptop and a laptop bag when I ask that, they are saying that it is auto generated. I'm not fulfilled with that purchase. So i wish to take concern action on them and solve my problem.