Airtel — They are not closing my airtel payments bank account

Address:

visakhpatnam

Hi have lost my previous airtel number and i coudn't get it back, i have airtel payments bank account with the number.
when i contacted airtel team they asked me to send aadhaar and bank cheque to close the account. i have done what they asked and they said account was closed.

but now when i was trying to open new airtel payments bank account with my new number it was showing you have already had a airtel payments bank account with provided aadhaar.

as airtel is telling that old account was closed, then why can't i open a new account with my new number