Vodafone - prehistoric internet speed

I Avijit Hazra .I am using Vodafone GPRS(9734616797) with Micromax 310 G Data Card from June 2011.I recharged plan 98 or 149 on every month . But I am not satisfied with Vodafone GPRS because I am getting 20 kbps to max. 39 kbps download speed and upload speed is very low (0.01 kbps to 0.02 kbps). More than 50 times from july 2011 I contacted with Vodafone Customer care. Every time they saying same thing “give us some time like 10 to 12 days” and assure me that within the time period my problem will be solved. But till date I am unable to access Vodafone GPRS with a better speed. A renowned company like Vodafone’s net surfing speed like as prehistoric speed is dishearten me .
my contact no 9874373738