Tata Docomo — did not resolve GPRS problem

Address:

Maharashtra

i have activated GPRS(recharge of 48 for 1 month) on 15 November my phone(2700 classic) whose number is [protected] of TATA DOCOMO service provider, it was activated at that time for 2 hour but after that it get disconnected automatically , after that it is not connecting and giving problem that "subscribe packet data first " i have register my complaint there they gave me complaint number NWK[protected] and said we will solve your problem by 18 of November but till now they didn't sove my problem, i change my phone to check if there is [roblem in my phone or sim card but in that phone it gave me same problem,i called customer care several times but they unable to solve the problem, please help me out