Vi CHARGING US 2600 INR FOR IR

Hi Friends!! We are a NRI's In Australia, My Dad Owns A Vodafone Idea Number On Postpaid, He Has had It for 25 Years Since 2001, Since The Days of Spice Telecom, And We enabled IR 149, From Vi, As My Dad Only Requires OTP'S, We came from a India trip just over a week ago, and we enabled the pack, and 4 days later, My Dad Got A Notification from the Vi App, That His IR Has Gotten To 2600 INR, And The Only Thing We Did, GOT 4 Missed Calls, Declined One But Never Picked it Up, And SMS Incoming, But On The Vi Site, It Shows Mobile Data, We Had Mobile Data OFF, And Half The Time It Was OFF, And ON WIFI AND IT NEVER SWITCHED TO DATA, We Called Vi And They Said We Used INTERNATIONAL MOBILE DATA, But we explained we never did, My Dad Emailed Vi, It Has Been a Few Days But No Response, and we explained that Vi Chandigarh Sector 35B NEAR ICICI BANK, Told Us About The Pack, And Airtel Tells Us That Their POSTPAID Has FREE Incoming SMS. Please Help Friends For This. Thanks