Indian Railways — uncomfortable journey

Address:

Bangalore, Karnataka, 560003

I was travelling by train no. 12785, on[protected] from kacheguda to bangalore in a2 (Ac 2 tier) & last birth (Birth no 44). My pnr number is [protected]. I had paid rs. 1800/+ for tatkal services.
There is an ac motor above this birth which continuously making humming sound (May be 1 k hz frequency). It was unbearable for ears and i just could not sleep for a minute but i got very severe headache after the journey. I sought the assistance of ac mechanic who expressed inability to do anything as this is very common in last birth of all coaches.
In fact i deserve refund of ticket for the inconvenience caused to me.
Hope my complaint is taken seriously.

Regards,
R jayaram (65 yrs)
Pnr number - [protected]