Paytm — Shopping Transaction through mobile app

Address:

Pune, Maharashtra, 411009

Dear Sir/Madam,

Yesterday I purchase some products via Paytm Wallet but they just ask me for Log In and Password details after i update these details they had directly deduct my order payment not ask me to OTP on my registered mobile that means without OTP they had done the payment procedure, then how to you possible.. No any double security for Paytm Wallet?

Then anybody has to be hacked my account and done the any transaction without ask for OTP on my registered mobile...

So please tell me that how do I secure my Paytm Wallet with double and strong security?'