MTNL — not proper work of internet

Address:

Mumbai City, Maharashtra

i have mtnl broad band connection for internet(Rs 495 combo pack).........according to the scheme of plan my download speed must be 250 kbps(kilo bytes )......but it hardly reaches 40..it not connected proper it take 30 minutes to connected after it connected but speed is very slow like 40 to 39 kb only.please help me about this problem