I had purchased tata walky fixed wireless prepaid phone no. - . For a long period of time my instrument is not working properly on lifting Hand set it gets disconnected. I works fine with speaker. In this connection I have approached Tata indicom showrooms many times to change my instrument. But the showroom men say that company has closed prepaid scheme. the company is issuing /genrating bill continously for the phone set which is like waste box for me. I have not recived any call or not able to call from my walky so for which thing I wiil pay bill .