Xiaomi India — Need refund immediately of my Xiaomi 12 pro

It was extremely disappointing and shameful experience with Xiaomi 12 pro mobile, I purchased this mobile from Amazon or der ID[protected] almost 2 month ago, just after 1 month of purchase it started giving trouble, I complained about charging problem, it is getting charged as per commitment given by Xiaomi brand, however I adjusted with that, also, I started getting many problems thenafter,
1. one of the speakers of the mobile gone dead can't hear anything another speaker's sound became low,
2. Not able to receive call some times it gets hanged,
3. I can't talk on mobile without speaker on, I can't hear caller's voice neither they do hear mine, this is so embarrassing to talk on a speaker mode as normal is not working in the mobile, it is so embarrassing to talk on speaker while travelling or when out side or when to discuss certain confidential subject,
4. While watching videos on youtube sounds goes away automatically and I can't hear anything then after unless restart the mobile,
5. Mobile gets switched off automatically multiple times in a day,
6. Wile using it became slow takes longer time to open any application, FYI in my phone I do not have any heavy data or memory because of which it will happen,

I have been visiting Xiaomi service center in Panvel they asked to update software as a solution, later they said it will not be fixed with SW update they need to keep the mobile with them for 3 to 4 days and asked me to arrange another mobile when I questioned them I do not have any other mobile, they said that's not their problem, however to get the issued fixed I some how managed this, in my second visit I was told that mobile would be replaced as there are many issues with the phone, in my third visit I am told receiver of the mobile has gone faulty it will take another 3 to 4 days, when I am committed to replace the mobile why again they doing post mortem of the new mobile.

I purchased this expensive mobile for the first time from my hard earned money and within a month it started giving so many issues I am very disappointed with Xiaomi mobile experience, this was my first purchase of Xiaomi Mobile but worst ever experience.