VW -- POLO/Taigun --- Disc brake problems with sensors and disc-not solvable from VW and the showroom.

I had driven VW-POLO before for 10 yrs., excellent performance, no problems. Some of my friends had polo with disc brakes, they used to complain about poor brake system (sound in disc's while braking, sensor malfunction) in VW - polo with disc brakes only, but I ignored as i didn't knew the complexity. Later last year i bought VW - Taigun, after driving the vehicle, which is not even a year old, i started observing the same old problem of sound coming out of disc from brake's with disc only. Went to the VW - showroom in navi Mumbai, and they said Disc needs polishing, than they said vehicle needs to be kept running and not keep idle ( all this types of vague reasons) but the sound did not go. After 6 months, when i went again for the same problem, met other Taigun owner's with the same problem. Neither VW management or the Showroom knows how to solve the problem. My sincere request to VW-India to please look in to the recurring problems for disc brakes and its sensor issues in the whole range of POLO and Taigun and help loyal customers like us. This might become serious when we are travelling with our families and any untoward incident happens. Thanks for help.