Airtell postpaid connection
Monthaly plan changed without any information

Dear sir

i have a postpaid connection from airtel. i have requested to service provider to disconnect the connectio in month of marh2011 but they have not do same and offer me continue my number by pay one time rental for a year and my cell number will be continue with current plan. but when they send me bill, the plan automatically changed and charged bill 10 times more.lan