Not listen problem and not solving

My setup box is closed from last 3 month and local cable operator is not listen my problem and costumer care does not pickup the phone which is 18002121217
After three month they not listen my issue and not disconnect or not refund my money or security money
Plz solve out my problem from Digi cable

I attach my monthly fee card proof of fee submitted

I want refund my setup box money or my security money from Digi cable what can I do this setup box that is closed and no one active this

My Contact no. 9457777505
Mail I’d. [email protected]