MTNL Broadband — No broadband connectivity

Hi
I opted (unfortunately) for a MTNL Boradband connection as I was having a landline connection from MTNL already. But i am feeling so sorry and cursing myself why opted for this service provider. Since installtion, everytime the connection will give error and u will have spend hour and hours to be lucky to be connected with net. No. of complaints were made to Sarsawati Vihar Sanchar Haat as also on 1504. The lineman came; the land card of the computer is faulty (new compact pres. PC), then, the windows are corrupt, your shut down system is not proper, there were the replies given to me by the lineman. Motherboard (becoz land card is attached to it) got changed, windows re-installed and everything done but the MTNL guys are really hard nuts to crack. No response although visists on your aggressive chasing to your machine but of no use. I am fed up and going to write to other forums/ministry and refund of my monthly internet charges. please help if the things can be set right with your intervention.