BSNL — basic phone not working since 21/05/2008 not listening complaint lodged on 198 , i

dar sir, my newly installed basic telephone [protected] in Nov. 2007 with broadband had been working with heavy noise since beginning about which complaint in writing with sdo bahadurpur, over phone 198 with no result. since 21st May08 it was complelely dead. on 5th june it was connected again on 10th june it became dead. the outsourced person installing the above phone was demanding 200 rupees for good servce from exchange. more interesting person at exchange are asking over phone how the said phone is working from time to time lately on 10th june 08 at 8 a.m since then again the phone became dead . please advise what to do for this tipe of mischief played by bsnl staff.