Net Zero 4g Hot Spot biggest rip off ever Internet

This company is the biggest scam I have used before.  I only purchased it to have wifi at work as i cannot  utilize work place wifi for personal use..

I use it to watch one one hour show 2 days a week..and then just in case someone calls me on my cell or msgs me. that is all..

First couple of months it was only 19.95..then they said i needed to upgrade for more data and so i did..up to $39.95 a month..now they want $9.95 everytime i turn around saying i used up all my data before my billing cycle is up.  I did it twice..last time was yesterday 8/12/14 and today I get a notice and my wifi stopped that I needed more..I called as I thought this had to be an error..It is not..they say i Used up my data...That is impossible.  I dont used it at home at all.  Only for a few hours at work 

I told them I will not be using them anylonger..I cannot afford it at all. I am so disappointed.  It was no nice to have it..now, I dont care!!!