Airtel — received message saying 399 recharge will give 84 days unlimited calls

Address:

600097

I have received a message saying that ‘money saver
Unlimited local, std, roaming call+100 sms/day along with 1gb/day
On rs399 for 84 days
Or
On rs149 for 28 days
Non-commercial use. Call 505’

After doing recharge i have received a message it is applicable for 70 days... If i call to customer care they are telling it is not applicable for you... If my number is not eligible for that offer then why u send message