Please Help me Suffering after buying Apache

Hey guys i am new here but with lots of hope i am writing here please help me. My suffering story goes like this.
After a lots of begging nd trust on tvs i brought my dream bike apache 160 rtr beast model which was turend into nightmare very soon.
I got the delivery of my bike on 19-may-2014 was very happy it gave 55 wopping mileage it was awsome feeling i gave it to 1st service and my bike started giving trouble the head started leaking and mileage had droped to 35kms i always fill shell super petrol. I tried speak to svc but nothing worked my 2nd service was also not fruitful the problem was there so i took the matter in my own hands took it to a local mechanic i applied a lot of glue and fixed the head and the leak had stopped completely now comming to mileage it had increased to 49 i was very happy everything was fine then again the day came 3rd service i promptly went and gave the bike around 9:30am their was carbourator over flow which i had mention to them and mask vibration in job card around 4:30 i recived my bike nothing had changed i guess they did a water wash and oil change that all the carb was still leaking which i again came to my local mechanic and rectified. Now to add my problem the milage has again dropped to 37kms after 3rd service i am 100% sure that it was not my local meachanic fault coz i was im fornt of him while he fixed my bike he just open the part where the flute it and cleaned it fixed it. I took it to service center telling them the milage is low so they took it on some bech test and shocked me again saying my bike gives 75kms per liter. Its hopless to argue with them and my mechanic is not able to fine the fault which is causing this low milage problem my driving speed is max 55 till date i have only twice reached 98. So please help me how do i get my old milage back. I am suffering a lots as i am a student. Help me. Or refer me a good mechanic in bangalore.

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