Here are ways to determine if your internet service provider (ISP) is overcharging you. Check your bill for hidden fees and compare your current plan to what the ISP offers new customers. Measure your internet speed to see if it matches what you’re paying for. Contact customer service to discuss your concerns and consider switching ISPs if necessary.
Source: https://gizmodo.com/how-to-tell-if-your-isp-is-ripping-you-off-1851399788