Idea Cellular — Postpaid bill too much

Address:	Ludhiana, Punjab, 141002
Website:	www.ideacellular.com

I had bill plan of Rs.399 since 4 months. But in this bill cycle.. my bill came Rs 2600 approximately. Until my unbilled came 1721INR my number had not freezed. But my number should be freezed after my unbilled amount of 1300 INR.which is my credit limit. And i didn't receive any warning message. Now i have paid bill because of no choice. Company executive said that i used excess mobile data. But its wrong as i have wifi connections at my home as well as at work place. Kindle help me to refund my amount which should be atleast Rs 1950.