Good am i have a tamron lens thats need to be check and repair the rubber grip pls. help me to find a service center or accredited service center ng tamron

SOURCE: Tamron 28-300mm lens

Many zoom lenses of this length, and even shorter have the problem whereby the lens either extends or retracts under its own weight depending on whether the camera is pointing up or down. I had a Canon 28-105mm lens with this problem. More expensive lenses have zoom locks to prevent this from happening. $225 sound like a good price to me!

SOURCE: tamron 28-300mm lens disassembly help

Both, But start at the rear to remove the electronics and the outer barrels. Remove any rubber grip to expose 'hidden screws'. I would mark everything or document with pictures during disassembly.

SOURCE: ERROR 99

try cleaning the lens contacts of your lens and camera.

SOURCE: ERROR 99

I have faced similar problems previously with my Canon 20d and Sigma 170-500. Its even more annoying to see it happen in field while it would be okay back home. I was told that it is electronic compatibility problem instead of complaining the best was to change the lens and hence bought a 100-400 and happy ending.

SOURCE: I need a manual for Tamron Camera Lens 28-200/3.8-5.6

You didn't supply what kind of Tamron lens it is. I'm gonna go ahead and give it my best shot on a guess: Tamron 28-75mm f/2.8 XR Di LD Aspherical (IF).
If I'm correct, you can download the manual here: http://www.tamron.com/assets/pdfs/A09.pdf
Hope this helps!
/Chris