Optimum by Altice Billing without rendering services Melville New York

Optimum by Altice has unfair billing practices which now charges customers even without rendering services.  For instance I cancelled my service the 2nd day after the billing cycle and found out that I will be charged to the end of the billing cycle. So in essence they are charging me for 4 weeks of service that I will not be receiving. 

I spoke to numerous customer support employees only to receive multible answers to the same questions.  I will have to pay approx. $180 dollars without any services rendered for the next four weeks.  I feel this billing practice is unfair and doesn't seem legal to me.