BSNL GSM SERVICE — Unlimited data plan not working

Address:

Chennai, Tamil Nadu

I have purchased new 3G SIM card with 700 unlimited plan on 15 dec 2012 from guindy office.
Mobile no [protected], Account No[protected]
I have been told that plan is of 3.2 Mbps for first 5 GB and 256 after 5 GB Kbps for unlimited usage.
For first month everything worked ok, I got my first bill on 4 JAN 2013 with amount 402.00 Rs, payment due date 15 JAN 2013.
I have paid billed amount on 10 JAN 2013( receipt attached, also got sms confirmation for bill payment); but even after payment I am still getting only 256Kbps.
I have called customer care numerous times, but every time, executive filed complained; but never gave complaint number.
Executives always say you will get complaint no in sms, but I never got such SMS.
After waiting for some time.
I have also filled online complaint on web site Docket number A16TN300623, mobile no for communication [protected].
Also filed complaint on other grievance site TND/CO/2013/126
But I didn't received any reply or any call from BSNL and complaint has not been solved yet.
I already sent mail as per Grievance Redressal Mechanism link on Chennai BSNL web site. to DGM at [protected]@bsnl.co.in e - mail address.
Till date I didn't got any reply from the department.
I am not getting 3.2 Mbps even after paying full billed amount and now new bill will be generated for this month.
I am not going to pay any more until I get proper services.