Does your phone show "Sim card rejected" message after entering wrong PUK code. Then you are in trouble mate. You have two ways to get out of this.
1. Switch off the phone, remove the sim and install it again. Now switch on and see whether it asks for PUK code. If it is asking for PUK code, call the customer care, get the code and enter it.
2. Get a new sim card with the same number. Go to a retail store with the same ID proof used for the existing number, provide the details and get the new sim card. This probably will be the only option that will work . I just mentioned the first one for the sake of trying.