Xiaomi India — Defective device never replaced now dead

Phone had serverl issues over the time, no options to extend warranty requested for replacement several times had to visit service center,
mother board replaced in 11th month worked for 6 months and again is dead, now the cost of mother board replacement .repair is 20000,
for a phone bought for 23500 and 20000 repair cost with no warranty in just in 18 months or less is too much. very bad customer service though hd to complain continuously for 1 month to get a call back from them saying nothing can be done rude behavior by the customer support on the phone.

need a replacement of the phone as resolution.