After working on this guys survey- shah.vishal for around 15 minutes, I didn't received any completion code, so that I will get the payment for the survey. Even he mention in his hit " If you happen to recieve any code after completeting the survey then please enter it in the box below" So it means slog in this survey for free and don't get paid. What's happening to our beloved mturk?
Consider sending a note to explain what happened and request payment. It can't hurt to ask (politely of course).
"I have been mugged" Yep that sounds about right. There are far too many of these types of requesters on mturk now but it actually has gotten better over the past few years. There used to be many more when I first started. In fact Amazon used to actually advertise them on the dashboards. LOL Sorry about your luck though.