My tataphoton plus ac no 9048116294. so i have not used lost mont for single secon but bill came Rs. 500/- even i am calling custemer care her no signal at all but bill will come regulerly no one is responding for my proble. please help me what can i do now

sir/mam, recently i found tata photon modem . but i want to use that modem for my regular use
so plz give me some suggestion.
how can i able to use normally.and from where should i get the a/c no of tata photon
send some response to my email id:sitesh.bade@yahoo.com