Airtel — double time recharge issue

Address:

Bangalore, Karnataka, 560029

I was done a recharge in my airtel app to my own no mistakenly as i was supposed to recharge airtel dongle. What i am asking i am a costumer & i am asking to cancel my own order of my own no recharge. After contacting to customer care they are replaying there is no option.

1. I used my airtel app
2. I done recharge to my own no which is already in 399 plan in spite of that the recharge is showing successful for 349 how it is possible this is cheating.