Airtel — broadband connection payment

Website:

Airtel.com

Payment details while taking broad band connection
POS [protected] SADGURU COMMUNIC POS DEBIT ref [protected]
18/05/15 -rs4362
Reference no [protected]
[protected] was using Broadband
A/c no[protected]
I was told it is valid for six months .I disconnected after six months.After follow up Sadguru Communciations Airtel retailer the amount would be updated.Airtel says it has not recieved the amount in it systems.I paid again on[protected], Reciept no80659188.I paid twice.According to me I have to get need refund of rs 4362.