Number to call and cancel ?

Is there a direct line to call and cancel service and why should we have to pay to cancel when your company misleads people? Our bill was $300 this month!! My husband is a disable veteran who runs his own business from our home. We were told last year when we signed up that the lowest plan would be enough for us with me going to college online and him running his part time business. After 2 months of having the service we called and said it wasn't working correctly we were already out of data and it couldn't be right because we cancelled our Netflix to not use the data and we only get on facebook when were not using it for his business or my college. They gave us a free few tokens to use. A few days later we were out again. We waited a few months just dealing with it but then it got to the point I had to take a month off college because nothing would load. We called them to cancel and they told us to try to upgrade instead. We were scared at first because to upgrade was $50 more bucks a month something we didn't have. Then they also told us we could get the internet from 2-7 and it would run faster and not go against our data and also about the hughesnet status meter to monitor our data plan. I started doing my college work at night only and my husband used it during the day. We also did the upgrade. I wasn't sure why we weren't told about the free data when we signed up either can someone answer that? Within a few days we were out of data.... AGAIN!!!!! My husband bought tokens and it made our monthly bill $300 this month. This is insane. I want to know how you can lie to people and then tell them to upgrade and it will work better. We just want to talk to someone direct and we want out. I just wish on top of all the other bills we had to pay for this crappy service you would let people cancel for free who has been lied to about how the service will work great for them.