BSNL Cellone — copmlaint reg.barred service

i am bsnl costomer from last 5 year having cell one no.[protected]. but last month on 20.06.2009. my subject cell incoming & outgoing service has barred.without any reason. i have reveived bill on 29.06.09 amt rs.1182/- and last date of payment 04.07.2009. please activate my service as soon as possible. and reason for payment how can i communicate without my service. i have no any other cell no.accept above.