Airtel — 399 plan they sent message but not active

Address:	Dharwad, Karnataka, 581206
Website:	www.airtel.com

I have got the message for airtel 399 plan for 84 days validity but when i goto my airtel app it shows that validity for 28 day's please kindly let me know whether i do reachage for 399 or change my network provider for false commitments and i had talked with customers care (Worst service) as they said we don't know if you got message do recharge they say and they have given reference id rmpto[protected].
I[censored] can slove the problem its would be great thing