Vodafone India — charged for international roaming facility without activating the same

Kindly note i being a customer of vodafone for the last 16 years was travelling in philippines in the 2nd week of may 2018. I have tried to activate the roaming facility online for a number of times. But it has not got activated it was showing your request is under process neither i could enjoy any roaming facility there, which you can easily check internally. But while receiving the bill for this month i found your company have charged rs 2500 for international roaming facility.
Though i have made the payment in full but would request you to process refund of the same urgently.
I have lodged complain for the same your executive called me and assured feedback but have not called back since then.
Kindly return money to my account as you cannot charge any amount without providing the facility.