Comcast - Comcast Cable company continues to bill even after all equipment has been returned and services are not being received. Internet, Florida

comcast cable bills in advance so you always receive a double bill the billing is complicated to understand and it is too difficult to even deal with I decided that the cable services were too expensive and decided to downgrade, comcast refused to disconnesct my services so, I returned all my equipment and there still billing me just as if i havent returned anything. When I call to try to resolve this issue they tell me account is frozen and they cant take off the additional charges unless I make a payment which I refuse to do because i dispute the majority of charges on the bill.

Even though i have no services I just got a bill yesterday ? they wont close the account but will continue to bill it ??? They tell me the account is supposed to be frozen to take off the charges yet, still manage to add new charges to this so called- frozen account???? hmmm  go figure..  definetly a rip-off company!!!