Airtel — self consumption of internet data even when not used.

I have a prepaid number of airtel. I have 1.4 gb data per day but it is very disappointing and annoying that my internet data gets finished even when i do not use it. If i watch a single episode of 25 minutes, it consumes almost 1 gb data which is too much. And its not the first time i faced this problem. This is maybe 5th or 6th time. It is high time now that airtel has to stop this nusince or i will move to some other company. Airtel is a well reputed and trusted company but this act is not acceptable.