Data Usage

So I've recently upgraded my plan from Preferred to whatever is next - Premier? Since my in-laws have moved in with me, my data cap is over the limit every month for the last 6 months. They stream a lot of TV and I've been kind of stressed out trying to monitor the connection and make sure we aren't using 'too much data'. Anyway, I've upgraded my connection and the data cap only went up 50gb and we're still 30gb over the plan with 8 days left in the billing cycle. I'm getting tired of worrying about this data cap. All anyone does is stream Hulu or Netflix, download the occasional game and I worry COX is going to disconnect me or something. I'm thinking about trying Uverse or something. Someone has got to have a more generous data cap. I am self employed and don't want to worry about service interruption. Any suggestions out there?