fair policy unfair

<br> My adsl line was installed two weeks ago. Recently I was throttled because of 150gb of usage which was for me highly impossible on a 2 Meg line also not being home during the day we do use it in the evening and weekends obviously we do our downloads or go on YouTube and so forth but logically 150gb means dl nearly 140 movies or even watching them or streaming no updates was done also.i recently relocated to new home and never experienced this before even though your fair usage policy was implemented. <br> If you can please investigate