Airtel — change of name from corporate to personal airtel carelessness

Address:

C-4 BLOCK, NO :44, 1ST FLOOR, TNHB COLONY,, PONDICHERRY SALAI, KUMARAN NAGAR, SHOLINGANALLUR, Chennai, Tamil Nadu, 600119

I have visited airtel showroom multiple time to change my corporate number to personal since I relieved the company .

The sim in karnataka circle when I visited sholinganallur tamil Nadu branch airtel customer care they asked for HR letter and documents then I went to Bangalore and took details from HR and came back . Then they told since the sim is in karnataka circle go to Bangalore and raise request.

Then I travelled to Bangalore and went to indira nagar customer care and submitted the docs they told the HR letter date should be with 10 days gap . So again I went to HR and took new letter and submitted. I got an sim and a below message.

"Hello! Reference no. 90312085 for your Airtel Mobile has been registered on 13-MAY-2019 17:02. The same will be closed in next 3 days. For status update, SMS SR (ref. no.) to 121"

They told in 4days it will get changed.

Now after 3 months still the name change is not done and also they ask me to submit the HR letter and document again .

I need a solution my ex corporate is not ready to give any more letter they told they will deactivate the sim by tomorrow.

I'm helpless I'm a business person change in number will result in losing many contact .