Vodafone India — charged rs. 2234.54 for a toll free isd number

My corporate vodafone mobile number is [protected] and i have been charged rs. 2234.54 for a toll free isd number. Although, i have not enabled isd as well and also there was no threshold set for my number.
I attended the call on thu 5/2/2019 and it was a toll free number and once the call ended. They stopped all services on the number without any prior information.
They also asked me to pay before 21st else they will charge rs. 100 extra on the bill per day.

I have bought the sim from exl center 5, noida sector -58.

Exempt me from this payment else I will have to file a complaint with consumer court as you are charging for toll free number.

Take immediate action as this is critical.