OnePlus India — Audio Device repair issue

Claiming one of the best brand in India, OnePlus this time really have disappointed it's customer by running a scam.
Recently in September I have raised a repair request in OnePlus care with pickup/drop facility and for 1.5months the device was there without any updates on its. So I escalated case 2-3 times and one day after 1.5-2months suddenly got to know that they are returning the device because bill was not uploaded.
Now they closed the facility so I thought of travel 65kms to repair it by taking appointment online and found that only one OnePlus Authorized center in whole Assam is closed and no one from customer support also know this.
So now after 2.5months of all this, my device is still lying some where and of which warranty is now going to over next week. Because of @oneplus 2.5months of my device got finished and still didn't get the resolution and now it's ready to be an electronic waste in few days.

OnePlus support service is worst. Can't trust this brand again. Don't buy it's products.

I want my complaint to be solved soon.