Vodafone India — my usage shown in my vodafone app

Address:

Kutch, Gujarat, 370040

Please provide information of my usage your vodafone mobile app in my plan 600 min available for the one month bill cycle my bill is generated as on date 26.10.2018 as on date 30.10.2018 in my vodafone mobile app my 600 min used and other 40.50 rs charge shown in my current spend so we shocked we used 600 min + 40.50 charges so kindly confirm me whats problem