Tata Motors — After 5 months over from booking my car didn't get delivered

I booked a Tata Nexon XZA+ (Petrol) on November 13, 2021, and paid Rs 4 lakh as a deposit. (All required documents are attached.) According to the commitment document, the expected delivery date was January 24, 2022. But till now I have not received any update regarding the delivery of the booked car after nearly 5 months from booking.

1. I complained to Tata Motors customer service three or four times (most recent complaint number is[protected]. I was promised that the authorized dealer would contact me as soon as possible. Mrs. Pushpa (Mob No. [protected]), the sales manager of Siva Sankar Motors Private Limited, told me that nothing was in the dealer's hands and that I should contact Mr. Deepak (Mob No. [protected]), the regional manager (Andhra Pradesh region).

2. I contacted Mr. Deepak and sent an email requesting an update on the progress of my car's delivery. He has not yet given me a response. I called customer service again to inquire about the delivery status, and they directed me to contact Mr Murali (Mob No.[protected]), general manager of Siva Sankar Motors Pvt Ltd, but Mr. Murali did not answer my phone call. Mr Deepak and Mr Murali have not sent me any reply by an email or by telephone.

3. Meanwhile, I made 40 to 45 attempts to call customer service to get updates of my complaint. Sometimes they disconnected me in the middle of a conversation, sometimes they made me a fake promise to call back later.

4. And finally, one day, they set up a conference call with Mrs Pushpa (sales manager, who initially told me the dealer had nothing to do with me), this time she requested me to wait another two weeks while they checked the stock updates of the desired vehicle).

After so much squandering of time and so many false promises, a pledge to wait another two weeks was made. The most important thing is that they did not clarify whether or not I will receive my car after two weeks this time.
Every day, so much time is wasted phoning customer service to resolve the issue, and I end up floating in the same loop, which is making me more depressed by the day. The experience of purchasing a car has left me disappointed and traumatized.
Sir, I beg you to free me from the mental harassment of these employees of your organization.

I have booked my car in my husband's name: Mr. Sourav Chakraborty.