Microsoft — Battery

Address: 122002

Website: www.microsoft.com/en-in

I have contacted them many times but no response from them. So i am here.
The below details are of the care where i give my battery to replace on 28/09/2015.
Care Center Code : 442_433527
contact no of care center : [protected]
Job Sheet No. :[protected]/150928/044
That is given to me from care on 28/9/2015
And the very first target delivery date was 31/10/2015. after this date when i went there to receive my battery they said that they had received a other models battery and the give me a new date that is of January and when i call them they said we still not receive the battery from the company,
I have complain about this via mail to the company first tyme wen i complain they do not respond me and when i again complaint on 23/02/2016 they call me on 24/02/2016 by the no. [protected] and he said that i am transferring your complaint to the higher authorities but again no response till now.
Now you guys tell me what should i do after all i am a student and i am very upset because i have my phone but of no use without battery.
IMEI no. [protected]
Battery details that i give them to replace.
Model name : BV-5JW
Product code : 0670633
Seriel/IMEI No. :[protected]A20153067
Parent IMEI No. : [protected]
Major Symptom : 5412 Battery: Drains too fast.
but still when i call them they simply reply that the battery is not recieved .
i want my battery and recompense for the problems i faces from the company.