Yamaha Motor India — Pathetic service

Address:

560043

I gave my bike (Ap 28 bu 4326) for servicing on monday 18-apr-16 @pacer yamaha service center, kalyan nagar, banglore.
Problems before servicing:
1. Front wheel was giving some jerk(I think problem was with rim)

I took the bike next day (Tuesday 19-apr-16) and bill was 5000+.
Problems after servicing:
1. Default race position was very high.
2. Accelerator was not working properly.
3. Chock wire was left open.
4. My original problem was still as it is.
5. Bike started giving jerks as like no petrol in tank but approximately 2 litres of petrol was there.

I again went to service center and explained all these problems. They fixed problem number 1, 2 & 3.
Problems i am facing now:
1. My original problem was still as it is (Front wheel was giving some jerk).
2. Referring to problem number 5, whenever i am driving my bike at constant speed (Ex: 52 kmph) its giving jerks like petrol is over but my bike tank was full.
3. Most disappointing problem is my mileage reduced from 41 kmpl to 31 kmpl.

I am totally disappointed with the servicing. Please let me know further steps to escalate this issue. Please revisit your service centre norms.
This is really pathetic, you are charging for bike servicing like car but giving crap service in return.