Airtel — sim not activated since one month

Address:

43-179/2, Hanuman Nagar, Moula-Ali, Hyderabad, Andhra Pradesh, 500040

Hi, i took a sim card with the number my brother in law holds. It got disconnected as he lives in us currently, so took a new pospaid sim with the same number. Submitted all the documents too. Airtel store person said it will get activated in 3 days but it's been one month, everytime i call them they said the approval is taking time it may take 2 more days for activation, visited the store too again but they responded in the same way. It's been more than a month and the sim is not activated yet.