Whose mistake is this?

I am using Vodafone prepaid sim card. I activated sms pack; 1,000 sms’ free for 30 days in last month, and 15,000 sms’ free for this month (till October 25, 2010). I send around 500 to 1000 sms’ in a day (both official & personal).

1. When I was using, 1000 sms’ pack, the pack exhausted, and I kept on sending sms’ until my balance was over; zero! I didn’t get any notification about the pack is over. Is it right to expect the notification? Or am I just over expecting?

2. Then, I started using 15,000 sms’ pack. It went smooth, 1000 sms’ a day, until day before yesterday when my balance again dropped to zero. I called up their customer care & complaints, they told me the day before yesterday was a black day, and my sms pack was not working & got deactivated for that particular day. It was a festival day, Dasara. I kept on sending sms’, and was charged double over 160 sms’. This, too, I was not informed. Again, is it right to expect it? Or I am wrong, and I am over expecting?

I called up and complained; and even asked to refund my money. Both times, I recharged with Rs. 351, quite a big one for me; and I lost Rs. 702 in the meanwhile. What do you think should I do now?