Bajaj Auto — About service

Address:

680121

Had purchased bajaj auto maxima on10/08/15 ... after 1st service finesh a noise in back engine .. Then i tell to service center of bajaj . Then he tell after first service the noise was stoped ... but after second service same noise continue i tell to the service manager also... i pay also for service i col bajaj office trissur but no reply... am so upset ... please solve the problem please help me...