Uninor Prepaid Mobile — wrong sms about validity

Address:

Sultanpur, Uttar Pradesh

hello,
our uninor mob no [protected] and name gaurav khandelwal.

we receive sms on your co that your validity of free minute is expire on 16/8/12.so pls rechargea 197 to carry forward your free minute.

but aug 15 we see our free minute lapse.when we call customer care about sms(received dt.12/08/12 at 9.01 am.) they say it was mistake and when we say pls register my complain,they say we forward your complain but they did not do so.