Vodafone India — wrong internet usage charges

Address:

Mohali, Punjab, 160059

I am using voda no [protected]. Recieved bill as on 21-dec-17 having wrong usage charges for internet rs 500. On 18th i was wrongly charged for internet usage. I called customer care many times for this issue but not get a proper respond even called appellate authority no[protected] but call disconnected by executive. Why should pay for the same if i have not used the services.