Airtel — Unclear and extra bill amount

Address:

Airtel india

I was using Airtel one plan worth rs1999 and after few month i suspended my account calling in Airtel but now I'm trying to get it but air. Ask me to pay 5772 rs which is non showing anywhere and not having bill details also randomly they put due on my number without bill. When I ask bill they said there is no data for this account. ([protected]) this is my account.