Huawei — replacement of battery in huawei nexus 6p from authorised service center

Address:	Jaipur, Rajasthan, 302019
Website:	[email protected]

Huawei customer service team,
I deposited my mobile nexus 6p (Imei no. [protected]) on 30 october 2017 at huawei service center, jaipur via so no. 171044hjai0300005 for replacement of battery. The center technician kept my phone for 7 days and returned my phone on 6 november 2017 saying that the battery will be procured from gurugram office and till that time i can use my phone by frequently charging it.
I have already paid rs. 1128.63 as service charges and cost of new battery. On 10th november, i enquired about battery, they told me that battery is being procured from china and will be replaced in my phone on 20th november. Today 20th november when i enquired, it is informed that battery will be available in middle of december! What is this? Do your authorised service center work this way? If my phone battery is not available, i should have been informed accordingly.
Please reply to me as i am facing lot problems due to battery drain as it does not retain charge for more than 4 hours.
Irequest you to please help me in this matter and get my phone battery replaced soon.