Vodafone - Excessive International Roaming Charges in Baku

First and foremost I did not activate my international roaming when travelling in the month of May **** when I had called Vodafone customer care no. in April ****. I had specifically called to enquire about the ** day international roaming package and if I just activate the international roaming then what would be the charges which was informed to me would be Rs **/min for outgoing and Rs **/min for incoming.
I was also told that I of the country I was visiting Vodafone does not have service? but to my surprise it was working there also
When the bill arrived I was charges international roaming charges in April **** bill and was charged Rs ***/min for * mins totaling to an amount of Rs ***.** which was approx * times the rate informed to me as above