Airtel — sim card issue and number not activated

Address:

Korattur, 600076

I have recently converted my Postpaid number to prepaid, previously it was my Husband corporate account. On 10th May i converted to prepaid and 11th of May i made recharge of 399 pack. But after two days my sim got failure/error. so visited Airtel store and got new sim dated (18May2019), expected it will gets activate within 24hrs. But got frustrated with Airtel because since then i have visited many Airtel stores and got 4 new SIM's till date but everyone saying same story that its getting rejected.
Please tell me who is responsible for this issue? For past 20days i couldn't able to use my mobile and i'm struggling with banking works without my number. Atleast if anyone helps to change my network with the same number it will be more helpful. I'm done Airtel. Even we are planning to change the network for rest of my family's Airtel numbers to other good network because of your poor response. please provide me the solution.

Mobile number : [protected]

Temp contact number : [protected]