Airtel Prepaid SIM — deduct balance

Address:

Sikar, Rajasthan

Sir,I have airtel mobile sim no.- [protected] that sell at 4 feb. 2011 I ge 20 rs. balance and 100 MB internet free and I recharge 10 Rs. two vouchers that I grt 32 Rs. as with SIM.I use 92 MB at 7 Feb. 2011 at night I use 3 MB more that total is 95 MB. When I disconnect it is show you have balance only .14 Rs at last IT deduct 25 RS. When I call customer care They say from here NO balance is deduct. Please help me.