DSL Charges - Airtel Billing - Means "PC Secure"

My dad uses Airtel PC Secure for Antivirus and they charge 85 Rupees per month as the fee.

In the billing section, this is mentioned as "DSL Charges" as shown in the below snapshot



Normally, DSL Charges are also used to mention, charges for internet usage in excess of your limit defined in your plan. If you are in an unlimited plan, you should not be charged at all ...

If you never asked for PC Secure, call Airtel customer care immediately and ask them to revert these charges for current and previous months bill if any.