[Resolved]  BSNL — BSNL Call Now Calling card

Hi,
I'm a BSNL postpaid customer from chennai. I purchased the BSNL 'CallNow' calling card which can be used to make international calls at lesser rates. Before buying the card I enquired and came to know that it could be used only in BSNL ladlines and postpaid mobiles. I bought the card of Rs.2000 denomination since calls to US costs Rs.1.75/- in that. Initially there was no problem. But after few days I'm not able to make calls to US during the daytime (indian time). I'm able to call during early morning and late night times only. Other times it says 'number cannot be accessed'. I was able to make calls from other phones, say airtel and all..at that time. If i'm not able to make calls at times I wish what is the use of keeping the card with me..
Does that mean that I should make calls only when they decide? Since there is significant time difference b/w India and U.S this has become a problem for me. I'm now regretting that I've wasted Rs.2000. Now i'm thinking I should have bought either Airtel or vodafone cards.
If I call BSNL customer care, only announcements are coming. Choice for speaking to customer care executive is not there.
I never expected that BSNL service is this much poor.

I'll surely say BSNL is the worst service provider..