Airtel — Very slow speed of GPRS Internet

Hello sir,
I am regular user of the Airtel GPRS.it is now providing very slow speed for internet connectivty, it has only 2kbps to 5kbps, but the other compnies like IDEA provide the GPRS internet connectivity at 60kbps to 85kbps in only charge of "15 rupees"per day with unlimited plan.it make big diffrence between Airtel and IDEA, therefore many consumers turned arroud with the other companies GPRS.so please do right activity in this problem and solve if possible.