Idea Cellular — Bill hike

Address:	Jabalpur, Madhya Pradesh, 482002
Website:	www.ideacellular.com

I am postpaid user of idea since 7-8 months approx. Initially service was ok but since last months abnormally bill hiked, saying data over usage. As i am not having any data plan activated on my plan i dont know how the data plan has activated in my number, when i searched for bill they said you have over usage of data, i exclaimed how data plan is activated on my number... When i opted to discontinue and port out from idea due to this harassment my port code was canceled by idea, and compelled me to pay advance rental payment, with rudeness and they are saying me to not let me port...
My question
1) without my permission how can idea start data plan on my number
2) if customer is unhappy with idea services who the idea hell to compel customer???
I am also writing all this to trai, and consumer forum