Paytm selling used mobile phones

Last week I ordered a K20 pro from Paytm mall. When I looked at the box the seal didn’t look original to me but I thought maybe I was wrong. Later when I opened the box and saw the phone there were minor scratches on the camera. When I turned on the phone there was no setup process and the home screen opened directly. Also someone has already logged in his MI account.

I have already placed a return request for the phone but I think a complaint should be filed against Paytm.

NEVER BUY A PHONE FROM PAYTM