Airtel — 3G speed issue not solved

Address:

Hyderabad, Andhra Pradesh

I had recently ported to Airtel, my mobile number [protected].
Activated 3G, and recharged with 3G data.. But while using the data, it is around 10-15KBps speed only..
I have called customer care, and lodged complaints regarding this..
But there is no response from them at all..
I even lodged complaint in their website, even that too no response..
Then I decided to port out from the network, sent msg to 1900, got UPC code too.. later in 12 hrs I got call from airtel regarding only the porting issue.. I said abt the problem, he gave me some number & disconnected.
when I called that no., it is different field.. still there is no solution to my problem issue..

Most important thing: I am not new to 3G, I know about the settings, clearing cache, history, memory etc all.
have been good at those..
whenever I call the customer care, they r saying I have to clear the cache, keep in WCDMA mode etc etc..
all those things I know.., while using net in my android mobile, there near the signal pointer it is showing H which means high speed data or HSPA / HSDPA.. but not in E (edge).. even in H mode, I am receiving 2G speed around 10-15kbps.
I even tried in differenet mobile, and also in usb dongle.. but the speed is same..ie low speed around 10-15kBps..

I have browsed for this kind of problem is being faced by someone or no..
Yes there r people facing such problems, but Airtel being one of the top brand should take measures to solve issues..

One of the main disadvantage of Airtel is:
Not able to take care of customer/consumers complaints.
One cannot call or contact the customer care 121 or 198 only twice or thrice a day... later it wont connect to the customer care at all, even i[censored]r problem not solved.. it wont connect for a day or 2 days or 3 days or even more..
That's the worst in Airtel..

Please solve my problem, and rectify the other problems.. which would be good advantage to the organization..