Citibank — Fraudulent activity from Citibank

This is in regards with the issue that I'm facing since from a very long time. I was trying to load the money to my Airtel wallet account. I used my Citibank account for this activity. However, the transaction couldn't be succesfull and when I spoke about the same to Citibank, they told me the amount has been successfully debited to the beneficiary account which is Airtel in this case and then I spoke to Airtel payments bank customer care about it, they said the issue is caused by the Citibank and not them. It's almost about 2 weeks now, still haven't got resolutions for the same and when I initiate the conversation with Airtel they blame Citibank and the same with Citibank they blame Airtel. It's going on a loop since from a very long time. Please help me with this issue. I request you to take strict action on both Airtel and Citibank for there hopeless services.