Xiaomi India — ( corrupted motherboard fitted by company) &not replace my new phone redmi 6(a)or not repair by service centre

Maine 11/06/2019 ko new redmi 6a phone liya shop se.. .maine Ghar par aker dekha to to phone ka flast/torch glow nahi kar raha tha.. Phir mai 12/06/2019 phone ko shop par return karne gya per shopkeeper ne phone return nahi kya...
Phir turant mai mi service centre gya par phir service centre ne bataya ki phone ka mother board kharab hai "mother board par pura jung lga hua tha".. Maine kaha to use change karo but service centre ne mother board change nahi kiya nahi phone ka flash repair kiya.
Phone ke mother board per company walo ne pani gira kar use aise hi phone me laga diya aur use sell ke liye transfer kar diya... Jo mere pass hai
Ek din hua nahi ki ner phone kharab ho gya...