Vodafone High Speed Internet — no surfing speed and downloading speed

Address:

East Delhi, Delhi

i am purchased the internet connection on dated 1-4-2011 and inform me the speed of internet is very high but i used the internet connection speed is 236.8kbps and downloading speed is 1to3 Kb/s..............i am also compliant your costumer Cara(chahi building,krishna nagar) but no solved my problem and no any justification for this matter......................................my connection number is [protected]..................my usb data card 3765....................
please solved my problem
my contact number:-[protected]
e-mail [protected]@gmail.com