Unavailability of Internet Service

I am using Alliance Broadband Internet Service,Kolkata from May,2013.
Every alternative day my face problem getting internet service. When i made contact with Local operator (Pragati Communication) under Alliance Broadband , he did not pick up my cal at time and don’t try to solve my problem. Therefor my internet connection get unavailable for 2-3 days.
When i made contact to main alliance broadband support desk(18001200300), they told me to contact local operator(i.e. Pragati Communication), when he is unavailable on call and he did not say us about office address.
My Address:
Paritosh Saha
Hanapara, BG-20,
Kolkata-700012, West Bengal

My alliance username: panda_pc3
My local operator nick name: Mr. Babu and his number :9143043657.
My contact number: 9836088592

I am really frustrated as i do not get internet service timely. Please do something.