Airtel — Bill already paid but added in next bill with late payment charges

Address:

Airtel , Udyog Vihar , Gurgaon

Bill paid on 25.1.2022 within due date but by mistake mobile number of some other customer mentioned .On learning of mistake whole details given to Company but because of poor customer service credit of amount of Rs 710 paid by me and received by Airtel is not being given and company want the new bill with already paid amount to be cleared with late payment charges on bill already paid .Not concerned with problem of customer . 99107xxx39