@Avasha as it is already 5 days past and no trace about it, better you start processing for the new documents. If another customer engaging the taxi saw it, then he must have stolen it. It is no use waiting for it and wasting time. All the mentioned cards can be got again. In fact a friend of mine lost her handbag during a cultural celebration in Katara and she could not get it back, she applied for all her documents and got it replaced in 1-2 days. So don't waste time, be more careful in the future..