BSNL EVDO CARD
Low Signal and Poor service

I am in bangalore @ near HAL airport. I took a BSNL EVDO card for rent 1 month before. While buying the card bsnl person told that, they have a signal in all over bangalore. In my house signal is very low. Speed also >100 kbps. So i try to book a compliant using the customer care number 1500. They gave me some other number for booking compliant. I called that number they given me 080-28450010, 080-28450410, 080-28450420 these number. But no body is responding these number it's keep on ringing. What to do?

Please help me...