Sir in my humble opinion, of course, with no intention of offending anybody, I believe that Osama is avoiding you and you should not visit his shop. No matter how busy, a mechanic interested in working on your car would have the decency to at least pick your calls.
I can understand your struggle, there are very few mechanic like him who are knowledgeable, so I would urge all Pakwheelers to please help mr @tintin1 find an equally good mechanic who is keen to work on his car so that he can enjoy his ride trouble free.
Also I would urge all members to look at the problems from his perspective, it's his first time owning an SUV and it's been less than a year, nobody was born with the expertise, theu all learnt. Often times the advice on Pakwheels is excellent, but on ground realities are different and we have to settle for the next alternative. So we should look past the small things and focus on the bigger picture of getting the beast back on road healthy 