Charged for not using their service

I have not used their service for the entire month of September, yet I see on the account I'll be charged a full 250.00. What service have I used? None. Being charged for not using their service is disgusting. I am going to use all forms of social media to complain about this, I already had a issue this year where for 2 months I had next to no Internet connection but only get refunded for one month. I left it as is but this draws the line. I want this resolved by today