Airtel — Double payment done

I am A.goswami chose the plan 379 /for 84 days for my husband. .paynent done on 29.5.2021 at 11.30 a.m from sbi bank..no acknowledgment came upto night 10 p.m
.
as 30th was last date for recharge my nephew recharged 379 / at 11 p.m same night & acknowledgements came..

Now how can i get back my 379/.. ?pl.help
Ph.no.[protected]..
customer care service is not responding..email sent . Answer is this is not registered email id..he is customer fir 25 yrs.