Aircel — Unauthorized billing

i am using easy-postpaid No. [protected] . Initially there was no problem
but suddenly after 2 years you have started billing on my address. As i
have Rs. 149 plan (easy postpaid) which provides 6000 sec + 200 sms
free (Local- National). But now as per bill u have charged for my calls (
STD) and SMS which i do not understand because every charge is deducted
from the balance in my account. Every time when i crossed free limit of
6000 sec. it has been observed that my services are used to
disconnected and i never got any benefit of credit limit i.e. Rs.50 . It
is requested to please make me understand for what i am getting these
bills on this account. An early action in this regard would be
appreciable, otherwise i will be forced to switchover to other mobile
service.
Regards
Deepak Kumar jammu