Airtel Call Manager — Not working ACM but deducted charge for it

Address:

South 24 Parganas, West Bengal

I am activate AirTel Call Manager Service on 19 Jan 2011 at 11.52.54 AM, but it was not working on 25 Jan 2011, I contact customer care on 26 Jan 2011 for this but they do not Solve my problem still now on 28 Jan 2011 at 01.00.45 AM, My Mobile No is [protected]