Lenovo — Lenovo Laptop Ideapad 5

I brought this laptop few months back and since then its one of the USB port is not working, first I had a bad experience at reliance digital as they mis lead me and sold this laptop to me. They said it's Ram can be upgraded and However when I confirmed with lenovo they said it cannot be upgraded.

The second major issue I faced is that one of the USB port is not working since the day I bought it. Few days back I contacted Lenovo support about the same they checked the system and sent a technician and even replaced the USB port however the ports are still not working. The technician told me that it has some issue with Motherboard and it needs to be replaced.

I am fed up now, FIrst with the false sales made by Relaince Digital and now Lenovo product is defective.
I want a new product under replacement