Airtel — Money deducted , no recharge of services

I had recharged for whole year data subscription worth Rs 2700 . I was debited instantly but no recharge, i tried contacting airtel multiples times regardind the issue but once i call their helpline no there is no option to proceed, worst customer care they have .
Airtel just loot their customers on failed recharge also i didnt get my money till now as they promise it will be credited back to account..pls resolve this issue..2700 is a big amount. I would suggest people never try to pay for a recharge plan of more then 1 month and try to avoid airtel services..previously i hated jio but atleast they are not so cheap like you guys .