I think you are not used to handling these b..str..ds........first of all you never keep the originals with you, always keep a good quality color copy which looks original, if they argue just tell them its the only one you have got - they cant do nothing,
Its our bad we are citizens of this so called moronic country where a landcruiser roam around without any license plate what to talk to papers, and a bike wala is made to feel ashamed of his state of being shareef. Allah make it easy for you brother, dont worry just go to the police station and warn them if they can not hand over the originals to you, you're gonna report to the DIG traffic and then do it, i am sure they will give it back to you.