OnePlus India — Customer care not providing parts

Dear Sir
On Dtd 28/08/2022 i visited Oneplus Authorized service center Address:-Madubani Commercial Complex Near Vishal Mega Mart Kanth Road Moradabad-244001 phone no:- +91-[protected] for the repair of my mobile phone Oneplus 8pro to change my back glass and battery,
On that day they said that they currently don't have parts right now so they ask time for 1 week time and ask me to deposit 4000INR so i deposited money.
Till today they have not provided me parts that i requested him many times but every time they ask for more time
i don't know what to do so i requested you to help me

From

Prateek Gupta
Email:- [protected]@gmail.com