Vodafone India — Unwanted cost in my mobile bill

Address:	Mumbai City, Maharashtra
Website:	Vodafone India

My number was activated with 24 gb 4g data plan for three months which was apparently free... Unknowingly i spent a large amount of the free data that was 7.9 gb out of 8gb for the month.
I had 23 mb remaining until i was to be charged for using internet without a plan... But i was charged 181 rs for 3g and 5rs for 2g.
A unwanted vas was also activated which cost me 150 rs and when i spoke to the executive he said that he will take care and that cost will not be seen in the upcoming bill. He also asked me to download an application in order to prevent pop ups while surfing the net. It had been almost a month and no action has been take whatsoever.