Xiaomi India — phone not functioning properly

Address:

Somerset Apartments, Midford garden, MG road, Bengaluru -560001, Bangalore, Karnataka

My new phone Mi note pro 7 which I had bought a month ago suddenly went into headphone mode and is not functioning properly without a headphone attachment. I cannot speak on the phone without my headphone attached to it. This phone cost me 18k and is just a month old. This is ridiculous. My older mi phone note 3 also went into headphone mode a month back. When I tried to fix the same, Mi service centre people blatantly told me it would cost me 5k to fix it. They asked me to buy a new phone instead and were least bothered to resolve my problem.
Highly disappointed with Xiaomi