Bharat Sanchar Nigam Limited [BSNL] — Coverage problem

I have BSNL Agree plan in mobile prepaid sim card. In that I have got internet plan also but there is no coverage at all for both internet as well as for phone most of the time. I have discuused this with other BSNL users and come to know that they also have same issue. Why BSNL only (in comparision with other mobile companies) has coverage problem though it is government company? I am paying for service of 24 hrs, amn't I? please tell me what to do for this as I want service from my own company that is goverenment and not from any other company.