is business (in it's real sense), you can easily pass the IO there.  I suggest, you bring a recorder and record your conversation.  If they offloaded you again or not allowed, you can use the recrded conversation to file a case of abuse of authority and file it at the CSC.

But if in any chance, your purpose is just to find a job here and the visa is just a cover-up, forget that I even advise you!