Airtel — airtel 399 plan is not given to my number

Address:

Gurgaon, Haryana, 122001

I called customer care, they said that offer is not applicable to my number and they will raise the offer request and it will be activated i a week but even after a month also it's not activated
I called again after a month they tell the same thing that offer is not applicable to my number.
When everyone has got 399 offer i am not getting the same instead it's showing 799 offer in my airtel app.
I have 4 airtel numbers in my home.
Therefore i request you to activate 399 offer immediately to my number.
Otherwise in the next 3 days i'll be porting all my numbers to vodafone.