Vodafone India — access fee charged for unknown reason

I recently did my vodafone no recharged. And i was charged almost rs 130 for access fee. I tried talking to customer care to understand why access fee is charged and none of them was able to clarify my question. What is access fee? Why am i charged access fee?

Below my split up msg after recharge.

Rchrg of mrp rs 154 on 28/04/19 successful. Tlktime rcvd rs 0.84, gst rs 23.49, accessfee rs 129.67, new bal rs.