Billing fraud by direct tv

We canceled our account a month ago. 
we paid the bill up until then. 
We were told we would have access until 8/23. 
yet our services were terminated upon cancellation. 
we called to try to access them and were told they would contact us. Never contacted us. 
now want us to pay last months bill and next months since the billing cycle starts on day of official shut off and they will send a refund. 
have tried to call multiple times and cannot get this resolved.