Consumer Redressal

I had taken an advanced paid broadband conncetion from tikona for 3 months. From the very next day of the connection, I had signal problems and was not able to use the internet. After repeated complaints thru telephone and mail, they sent their service people for checking, but the problem perisited. I had requested for disconnection and refund of money several times, but instead of giving the refund they have sent me a bill of rs 292/-. I had paid advance rental then how can u bill me. Despite complaints to the appelate authority no action has been taken.