@Varunvelavan:
First of all, any sunfilm (no matter of how much VLT) is banned. You can try "Magnetic Curtains", which are an alternative to sunfilms and fit snugly. Though, I am not sure if they are legal. Get it removed if you have it on the windows. If there is a stripe on the front windshield, then it is okay.
Anyway, coming to your query, if you are having bubbles in the sunfilm, you can try to press them with a squeeze (or a credit/debit card covered with a cloth) to remove them, by moving the bubbles to the sides. You can also make a small hole by using a safety pin (or cutter) and then press the air out from the bubble. Using a heat gun / hair dryer also works. You can heat up the area and the bubbles will be easier to remove, and the film will also fit better.
And, the dealer is WRONG. It will never go away itself if you don't apply pressure over the area. Tell him to get this corrected at his shop.
Regards,
Nikunj