Airtel — Is regulating security sms & one time passwords and not delivering these sms on my mobile

Address:

Mumbai City, Maharashtra

I am having problem with receiving OTP messages for - Online Wallets, Email Logins etc. Banking messages like balance enquiry, ATM withdrawal or Internet banking messages. Also some OTPs are coming very late which is no use. ( Because OTPs are valid for 10 Min) I Complained on Airtel Customer Care ( Dated 07.08.2015 Customer care Executive Name -Ajay Sharma on 1909 ) and they said de register your DND (do not Disturb) application. Since these are not Promotional/advertisements SMS how can airtel stop delivering these sms.
From last 3 to 4 years I activated my full Do not Disturb Service and never faced above problem. Now i am facing above problem After porting my mobile no to Airtel from Idea. Because of these i could not login to email accounts/on-line wallets, unable to do on-line money transactions etc.. Also I rechecked with my bank, Online Wallet providers and they re confirmed that my register mobile no is same as was previous and No problem from there side. My Mobile No - [protected]