Suzuki Motorcycle — complain about my bike having oil leaks on engine from last 1 year

Address:

Bangalore, Karnataka, 560035

Hi, my gixxer 155 is giving few problems.
1. Engine oil leak and sticks on top of the engine head. Form past 1 year. Visited multiple times and after multiple requests and assurance, still the problem persists.
2. Rattle/vibrate sound on accelerating the bike on lower gears.
3. No pick up at all.

Above complaints are repeatedly mentioned to suzuki showroom at sarjapur road near to sarjapur firestation, bangalore, but still no permanent resolution. Any suggestions?