t-mobile false advertising/truly NOT unlimited internet spokane, Washington

T-Mobile charges me for unlimited internet and I some how reached my limit. They advertise truly unlimited internet And it is truly not. I was not explained any caps or limits. I now can not access the web for the rest of my bill cycle. My billing cycle had started may 25 and it ends June 25. I was informed by a text message around the first of June telling me I have used to much internet and will be cut down for the rest of the month witch happens to be just a few days short of a full month. I am being charged 20 dollars a month for a service that I cannot utilize. T-Mobile is stealing for good people and need to be stopped! The advertising needs to be stopped cause they are false advertising!