How do you get rid of T-Mobile HotSpot?

I went on the site ONE EFFING TIME, because my mom had gotten a new Blackberry, and it had suggested me to. Now, randomly, I will go to an unrelated website and it will instead take me there, no matter how many times I refresh the original URL. It happens with every website, lasts for a long time, but only occurs every once in awhile. It is beyond annoying, and is there any way I can block it? Or just GET RID OF IT. It happens on my personal laptop, and I don't even own a goddamn T-Mobile phone. If ANYONE can help..