Which broadband services you are presently using? I am using BT Broadband services and there are generally two methods for checking BT broadband data usage:-
1. If you use your BT app to check your broadband data usage you have to download the app by clicking on the link:
https://www.productsandservices.bt.com/products/apps
2. And if you use “My BT usage monitor” you have to follow the below mentioned steps
• Login to your BT account by clicking on the link: www.bt.com/mybt.
• Go to “My Bill” > Click “View your recent usage”.
• On the next screen, select “Broadband” tab.
• Click on “View your Broadband usage”
If you are not satisfied with the solution you can also visit BT Customer Service here
http://www.alwaysreview.net/reviews/bt-customer-services/