Uninor keeps on on debiting my account for unwanted services . Then you have to call them and get it cancelled and then they credit your account. 3-4 days back they charged me Rs 60 for caller tunes and I had to get it cancelled. But now they are saying they will not give me credit as I had somehow activated the service. Uninor is a big Cheater and one should avoid it to save your valuable money.
You have to now and then check your account to see if your account has been wrongly debited or not.