Mtnl broadband work is very poor

I am using mtnl broadband. But it's not working starting from installation. But bil jas been sent to my address. I complaint many times. But till I am suffering.Please as soon as possible solve my problem. My mtnl no. Is 922. And I am regular visit mtnl sanchar haat before 2 month but no any response. Their custmer care no. Is not connect my phone.