Hero Motocorp — Hero passion pro bs6 bikes stops in the time of gear shift

Address:

Thekkevila,thalavoorkonam,kuzhimathicadu p/o, kollam,pin-691509

I brought hero passion pro Bs6 bike from your dealer venad hero, kollam, kerala, , after two days it shown strating trouble and i3s wasn't working.then I approached to your dealer and they said it is due to damage of battery & they replaced that.after 1 month bike shown same complaint and and approached them again they said it is due to complaint in starter motor and replaced that.now after one month bike shows the same problem and some time bike engine stops working while I do gearshift.what I have to do?? If the complaint repeats I have to replace the bike