I was using Tata Indicom

Hi,
I was using Tata Indicom from Last 1 year due to one reason that the incoming on roaming was absolutely free.But i discontinue the services in may, 2007 beacuse one gud day i got an sms frm 121 that my o/s bill is Rs.7500.00. I called CC & the reply was tat they had withdrawn the roaming incoming services & now I’ve to pay that huge amount.