BSNL Gprs — BSNL charged me even in GPRS prepaid unlimited plan

I recharged my number for GPRS prepaid unlimited plan for Rs.230 ( for one month ) on[protected].
On[protected] when I used this service, BSNL system charged me Rs 120. When I called BSNL customer care number after waiting for more than 4 hours someone picked up and rudely informed me that the unlimited service will not work on this day because of Diwali holiday, and after 12pm it will work again. However when I used it on very next day at 7am it keep charging me.

Let me admit that BSNL service is worst. Have anyone ever used BSNL customer care number from your mobile, try it . Without informing us that unlimited GPRS service will not work on Diwali is a loot.
Frequent call drops, poor signals problems, no customer care information, slow GPRS speed,
and BSNL's ignorance is just ridicules.